diff --git a/htdocs/contact/project.php b/htdocs/contact/project.php
new file mode 100644
index 00000000000..b05709f019a
--- /dev/null
+++ b/htdocs/contact/project.php
@@ -0,0 +1,117 @@
+<?php
+/*
+ * Copyright (C) 2021		VIAL--GOUTEYRON Quentin		<quentin.vial-gouteyron@atm-consulting.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ *  \file       htdocs/contact/project.php
+ *  \ingroup    contact
+ *  \brief      Page of third party projects
+ */
+
+require '../main.inc.php';
+require_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
+
+$langs->loadLangs(array("contacts", "companies", "projects"));
+
+// Security check
+$id = GETPOST('id', 'int');
+$result = restrictedArea($user, 'contact', $id, 'socpeople&societe');
+
+// Initialize technical object to manage hooks of page. Note that conf->hooks_modules contains array of hook context
+$hookmanager->initHooks(array('projectcontact'));
+
+/*
+ *	Actions
+ */
+
+$parameters = array('id' => $id);
+$reshook = $hookmanager->executeHooks('doActions', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
+if ($reshook < 0) {
+	setEventMessages($hookmanager->error, $hookmanager->errors, 'errors');
+}
+
+/*
+ *	View
+ */
+
+$form = new Form($db);
+
+if ($id) {
+	require_once DOL_DOCUMENT_ROOT.'/contact/class/contact.class.php';
+	require_once DOL_DOCUMENT_ROOT.'/core/lib/contact.lib.php';
+
+	$object = new Contact($db);
+
+	$result = $object->fetch($id);
+	if (empty($object->thirdparty)) {
+		$object->fetch_thirdparty();
+	}
+	$socid = $object->thirdparty->id;
+	$title = $langs->trans("Projects");
+	if (! empty($conf->global->MAIN_HTML_TITLE) && preg_match('/thirdpartynameonly/', $conf->global->MAIN_HTML_TITLE) && $object->name) {
+		$title = $object->name." - ".$title;
+	}
+	llxHeader('', $title);
+
+	if (! empty($conf->notification->enabled)) {
+		$langs->load("mails");
+	}
+	$head = contact_prepare_head($object);
+
+	print dol_get_fiche_head($head, 'project', $langs->trans("Contact"), -1, 'contact');
+
+	$linkback = '<a href="'.DOL_URL_ROOT.'/contact/list.php?restore_lastsearch_values=1">'.$langs->trans("BackToList").'</a>';
+
+	$morehtmlref = '<div class="refidno">';
+	if (empty($conf->global->SOCIETE_DISABLE_CONTACTS) && !empty($socid)) {
+		$object->thirdparty->fetch($socid);
+		// Thirdparty
+		$morehtmlref .= $langs->trans('ThirdParty').' : ';
+		if ($object->thirdparty->id > 0) {
+			$morehtmlref .= $object->thirdparty->getNomUrl(1, 'contact');
+		} else {
+			$morehtmlref .= $langs->trans("ContactNotLinkedToCompany");
+		}
+	}
+	$morehtmlref .= '</div>';
+
+	dol_banner_tab($object, 'id', $linkback, ($user->socid ? 0 : 1), 'rowid', 'nom', $morehtmlref);
+
+	print '<div class="fichecenter">';
+
+	print '<div class="underbanner clearboth"></div>';
+	print '<table class="border centpercent tableforfield">';
+
+	// Civility
+	print '<tr><td class="titlefield">'.$langs->trans("UserTitle").'</td><td>';
+	print $object->getCivilityLabel();
+	print '</td></tr>';
+
+	print '</table>';
+
+	print '</div>';
+
+	print dol_get_fiche_end();
+	print '<br>';
+
+	// Projects list
+	$result = show_contacts_projects($conf, $langs, $db, $object, $_SERVER["PHP_SELF"].'?id='.$object->id, 1);
+}
+
+// End of page
+llxFooter();
+$db->close();
diff --git a/htdocs/core/lib/contact.lib.php b/htdocs/core/lib/contact.lib.php
index c60cb0c8c18..5a0c6c376fb 100644
--- a/htdocs/core/lib/contact.lib.php
+++ b/htdocs/core/lib/contact.lib.php
@@ -57,6 +57,40 @@ function contact_prepare_head(Contact $object)
 	$head[$tab][2] = 'perso';
 	$tab++;
 
+	if (!empty($conf->projet->enabled) && (!empty($user->rights->projet->lire))) {
+		$nbProject = 0;
+		// Enable caching of thirdrparty count projects
+		require_once DOL_DOCUMENT_ROOT.'/core/lib/memory.lib.php';
+		$cachekey = 'count_projects_contact_'.$object->id;
+		$dataretrieved = dol_getcache($cachekey);
+
+		if (!is_null($dataretrieved)) {
+			$nbProject = $dataretrieved;
+		} else {
+			$sql = 'SELECT COUNT(n.rowid) as nb';
+			$sql .= ' FROM '.MAIN_DB_PREFIX.'projet as n';
+			$sql .= ' INNER JOIN '.MAIN_DB_PREFIX.'element_contact as cc ON (n.rowid = cc.element_id)';
+			$sql .= ' WHERE cc.fk_socpeople = '.((int) $object->id);
+			$sql .= ' AND cc.fk_c_type_contact IN (SELECT rowid FROM '.MAIN_DB_PREFIX.'c_type_contact WHERE element="project" AND source="external")';
+			$sql .= ' AND n.entity IN ('.getEntity('project').')';
+			$resql = $db->query($sql);
+			if ($resql) {
+				$obj = $db->fetch_object($resql);
+				$nbProject = $obj->nb;
+			} else {
+				dol_print_error($db);
+			}
+			dol_setcache($cachekey, $nbProject, 120);	// If setting cache fails, this is not a problem, so we do not test result.
+		}
+		$head[$tab][0] = DOL_URL_ROOT.'/contact/project.php?id='.$object->id;
+		$head[$tab][1] = $langs->trans("Projects");
+		if ($nbProject > 0) {
+			$head[$tab][1] .= '<span class="badge marginleftonlyshort">'.$nbProject.'</span>';
+		}
+		$head[$tab][2] = 'project';
+		$tab++;
+	}
+
 	// Related items
 	if (!empty($conf->commande->enabled) || !empty($conf->propal->enabled) || !empty($conf->facture->enabled) || !empty($conf->ficheinter->enabled) || (!empty($conf->fournisseur->enabled) && empty($conf->global->MAIN_USE_NEW_SUPPLIERMOD)) || !empty($conf->supplier_order->enabled) || !empty($conf->supplier_invoice->enabled)) {
 		$head[$tab][0] = DOL_URL_ROOT.'/contact/consumption.php?id='.$object->id;
@@ -117,3 +151,131 @@ function contact_prepare_head(Contact $object)
 
 	return $head;
 }
+
+/**
+ * 		Show html area for list of projects
+ *
+ *		@param	Conf		$conf			Object conf
+ * 		@param	Translate	$langs			Object langs
+ * 		@param	DoliDB		$db				Database handler
+ * 		@param	Object		$object			Third party object
+ *      @param  string		$backtopage		Url to go once contact is created
+ *      @param  int         $nocreatelink   1=Hide create project link
+ *      @param	string		$morehtmlright	More html on right of title
+ *      @return	int
+ */
+function show_contacts_projects($conf, $langs, $db, $object, $backtopage = '', $nocreatelink = 0, $morehtmlright = '')
+{
+	global $user;
+
+	$i = -1;
+
+	if (!empty($conf->projet->enabled) && $user->rights->projet->lire) {
+		$langs->load("projects");
+
+		$newcardbutton = '';
+		if (!empty($conf->projet->enabled) && $user->rights->projet->creer && empty($nocreatelink)) {
+			$newcardbutton .= dolGetButtonTitle($langs->trans('AddProject'), '', 'fa fa-plus-circle', DOL_URL_ROOT.'/projet/card.php?socid='.$object->id.'&amp;action=create&amp;backtopage='.urlencode($backtopage));
+		}
+
+		print "\n";
+		print load_fiche_titre($langs->trans("ProjectsHavingThisContact"), $newcardbutton.$morehtmlright, '');
+		print '<div class="div-table-responsive">';
+		print "\n".'<table class="noborder" width=100%>';
+
+		$sql  = 'SELECT p.rowid as id, p.entity, p.title, p.ref, p.public, p.dateo as do, p.datee as de, p.fk_statut as status, p.fk_opp_status, p.opp_amount, p.opp_percent, p.tms as date_update, p.budget_amount';
+		$sql .= ', cls.code as opp_status_code, ctc.libelle';
+		$sql .= ' FROM '.MAIN_DB_PREFIX.'projet as p';
+		$sql .= ' LEFT JOIN '.MAIN_DB_PREFIX.'c_lead_status as cls on p.fk_opp_status = cls.rowid';
+		$sql .= ' INNER JOIN '.MAIN_DB_PREFIX.'element_contact as cc ON (p.rowid = cc.element_id)';
+		$sql .= ' INNER JOIN '.MAIN_DB_PREFIX.'c_type_contact as ctc ON (ctc.rowid = cc.fk_c_type_contact)';
+		$sql .= ' WHERE cc.fk_socpeople = '.((int) $object->id);
+		$sql .= ' AND ctc.element="project" AND ctc.source="external"';
+		$sql .= ' AND p.entity IN ('.getEntity('project').')';
+		$sql .= ' ORDER BY p.dateo DESC';
+
+		$result = $db->query($sql);
+		if ($result) {
+			$num = $db->num_rows($result);
+
+			print '<tr class="liste_titre">';
+			print '<td>'.$langs->trans("Ref").'</td>';
+			print '<td>'.$langs->trans("Name").'</td>';
+			print '<td>'.$langs->trans("ContactType").'</td>';
+			print '<td class="center">'.$langs->trans("DateStart").'</td>';
+			print '<td class="center">'.$langs->trans("DateEnd").'</td>';
+			print '<td class="right">'.$langs->trans("OpportunityAmountShort").'</td>';
+			print '<td class="center">'.$langs->trans("OpportunityStatusShort").'</td>';
+			print '<td class="right">'.$langs->trans("OpportunityProbabilityShort").'</td>';
+			print '<td class="right">'.$langs->trans("Status").'</td>';
+			print '</tr>';
+
+			if ($num > 0) {
+				require_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
+
+				$projecttmp = new Project($db);
+
+				$i = 0;
+
+				while ($i < $num) {
+					$obj = $db->fetch_object($result);
+					$projecttmp->fetch($obj->id);
+
+					// To verify role of users
+					$userAccess = $projecttmp->restrictedProjectArea($user);
+
+					if ($user->rights->projet->lire && $userAccess > 0) {
+						print '<tr class="oddeven">';
+
+						// Ref
+						print '<td>';
+						print $projecttmp->getNomUrl(1);
+						print '</td>';
+
+						// Label
+						print '<td>'.$obj->title.'</td>';
+						print '<td>'.$obj->libelle.'</td>';
+						// Date start
+						print '<td class="center">'.dol_print_date($db->jdate($obj->do), "day").'</td>';
+						// Date end
+						print '<td class="center">'.dol_print_date($db->jdate($obj->de), "day").'</td>';
+						// Opp amount
+						print '<td class="right">';
+						if ($obj->opp_status_code) {
+							print price($obj->opp_amount, 1, '', 1, -1, -1, '');
+						}
+						print '</td>';
+						// Opp status
+						print '<td class="center">';
+						if ($obj->opp_status_code) {
+							print $langs->trans("OppStatus".$obj->opp_status_code);
+						}
+						print '</td>';
+						// Opp percent
+						print '<td class="right">';
+						if ($obj->opp_percent) {
+							print price($obj->opp_percent, 1, '', 1, 0).'%';
+						}
+						print '</td>';
+						// Status
+						print '<td class="right">'.$projecttmp->getLibStatut(5).'</td>';
+
+						print '</tr>';
+					}
+					$i++;
+				}
+			} else {
+				print '<tr class="oddeven"><td colspan="8"><span class="opacitymedium">'.$langs->trans("None").'</span></td></tr>';
+			}
+			$db->free($result);
+		} else {
+			dol_print_error($db);
+		}
+		print "</table>";
+		print '</div>';
+
+		print "<br>\n";
+	}
+
+	return $i;
+}
diff --git a/htdocs/langs/en_US/projects.lang b/htdocs/langs/en_US/projects.lang
index 9d3a83c7a61..e73a21dea26 100644
--- a/htdocs/langs/en_US/projects.lang
+++ b/htdocs/langs/en_US/projects.lang
@@ -284,4 +284,5 @@ PROJECT_CLASSIFY_CLOSED_WHEN_ALL_TASKS_DONE_help=Note: existing projects with al
 SelectLinesOfTimeSpentToInvoice=Select lines of time spent that are unbilled, then bulk action "Generate Invoice" to bill them 
 ProjectTasksWithoutTimeSpent=Project tasks without time spent
 FormForNewLeadDesc=Thanks to fill the following form to contact us. You can also send us an email directly to <b>%s</b>.
+ProjectsHavingThisContact=Projects having this contact
 StartDateCannotBeAfterEndDate=End date cannot be before start date
diff --git a/htdocs/langs/fr_FR/projects.lang b/htdocs/langs/fr_FR/projects.lang
index 1b3c6ec7662..950462968ed 100644
--- a/htdocs/langs/fr_FR/projects.lang
+++ b/htdocs/langs/fr_FR/projects.lang
@@ -284,4 +284,5 @@ PROJECT_CLASSIFY_CLOSED_WHEN_ALL_TASKS_DONE_help=Remarque : les projets existant
 SelectLinesOfTimeSpentToInvoice=Sélectionnez les lignes de temps passé non facturées, puis l'action groupée "Générer la facture" pour les facturer
 ProjectTasksWithoutTimeSpent=Tâches de projet sans temps consommé
 FormForNewLeadDesc=Veuillez remplir ce formulaire de contact ou écrivez un e-mail à <b>%s</b>.
+ProjectsHavingThisContact=Projets ayant ce contact associé
 StartDateCannotBeAfterEndDate=La date de fin ne peux être avant la date de début