diff --git a/htdocs/core/lib/project.lib.php b/htdocs/core/lib/project.lib.php
index b944e8b47a5..7b0b30bcaef 100644
--- a/htdocs/core/lib/project.lib.php
+++ b/htdocs/core/lib/project.lib.php
@@ -569,9 +569,10 @@ function project_admin_prepare_head()
  * @param   string      $filterprogresscalc     filter text
  * @param   string      $showbilltime           Add the column 'TimeToBill' and 'TimeBilled'
  * @param   array       $arrayfields            Array with displayed coloumn information
+ * @param   array       $arrayofselected        Array with selected fields
  * @return	int									Nb of tasks shown
  */
-function projectLinesa(&$inc, $parent, &$lines, &$level, $var, $showproject, &$taskrole, $projectsListId = '', $addordertick = 0, $projectidfortotallink = 0, $filterprogresscalc = '', $showbilltime = 0, $arrayfields = array())
+function projectLinesa(&$inc, $parent, &$lines, &$level, $var, $showproject, &$taskrole, $projectsListId = '', $addordertick = 0, $projectidfortotallink = 0, $filterprogresscalc = '', $showbilltime = 0, $arrayfields = array(), $arrayofselected = array())
 {
 	global $user, $langs, $conf, $db, $hookmanager;
 	global $projectstatic, $taskstatic, $extrafields;
@@ -910,6 +911,16 @@ function projectLinesa(&$inc, $parent, &$lines, &$level, $var, $showproject, &$t
 				// Tick to drag and drop
 				print '<td class="tdlineupdown center"></td>';
 
+				// Action column
+				print '<td class="nowrap" align="center">';
+				$selected = 0;
+				if (in_array($lines[$i]->id, $arrayofselected)) {
+					$selected = 1;
+				}
+				print '<input id="cb' . $lines[$i]->id . '" class="flat checkforselect" type="checkbox" name="toselect[]" value="' . $lines[$i]->id . '"' . ($selected ? ' checked="checked"' : '') . '>';
+
+				print '</td>';
+
 				print "</tr>\n";
 
 				if (!$showlineingray) {
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index 951406b4275..c619b25a37b 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -183,6 +183,14 @@ $varpage = empty($contextpage) ? $_SERVER["PHP_SELF"] : $contextpage;
  * Actions
  */
 
+if (GETPOST('cancel', 'alpha')) {
+	$action = 'list';
+	$massaction = '';
+}
+if (!GETPOST('confirmmassaction', 'alpha') && $massaction != 'presend' && $massaction != 'confirm_presend') {
+	$massaction = '';
+}
+
 $parameters = array('id'=>$id);
 $reshook = $hookmanager->executeHooks('doActions', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
 if ($reshook < 0) {
@@ -413,6 +421,7 @@ $help_url = "EN:Module_Projects|FR:Module_Projets|ES:M&oacute;dulo_Proyectos";
 
 llxHeader("", $title, $help_url);
 
+$arrayofselected = is_array($toselect) ? $toselect : array();
 
 if ($id > 0 || !empty($ref)) {
 	$result = $object->fetch($id, $ref);
@@ -544,6 +553,17 @@ if ($id > 0 || !empty($ref)) {
 	// Add $param from extra fields
 	include DOL_DOCUMENT_ROOT.'/core/tpl/extrafields_list_search_param.tpl.php';
 
+	$arrayofmassactions = array(
+		'clone'=>img_picto('', 'rightarrow', 'class="pictofixedwidth"').$langs->trans("Clone"),
+	);
+	if ($permissiontodelete) {
+		$arrayofmassactions['predelete'] = img_picto('', 'delete', 'class="pictofixedwidth"').$langs->trans("Delete");
+	}
+	if (in_array($massaction, array('presend', 'predelete'))) {
+		$arrayofmassactions = array();
+	}
+	$massactionbutton = $form->selectMassAction('', $arrayofmassactions);
+
 	// Project card
 
 	$linkback = '<a href="'.DOL_URL_ROOT.'/projet/list.php?restore_lastsearch_values=1">'.$langs->trans("BackToList").'</a>';
@@ -842,7 +862,11 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	$linktotasks .= dolGetButtonTitle($langs->trans('ViewGantt'), '', 'fa fa-stream imgforviewmode', DOL_URL_ROOT.'/projet/ganttview.php?id='.$object->id.'&withproject=1', '', 1, array('morecss'=>'reposition marginleftonly'));
 
 	//print_barre_liste($title, 0, $_SERVER["PHP_SELF"], '', $sortfield, $sortorder, $linktotasks, $num, $totalnboflines, 'generic', 0, '', '', 0, 1);
-	print load_fiche_titre($title, $linktotasks.' &nbsp; '.$linktocreatetask, 'projecttask');
+	print load_fiche_titre($title, $linktotasks.' &nbsp; '.$linktocreatetask, 'projecttask', '', '', '', $massactionbutton);
+
+	$objecttmp = new Task($db);
+	$trackid = 'task'.$taskstatic->id;
+	include DOL_DOCUMENT_ROOT.'/core/tpl/massactions_pre.tpl.php';
 
 	// Get list of tasks in tasksarray and taskarrayfiltered
 	// We need all tasks (even not limited to a user because a task to user can have a parent that is not affected to him).
@@ -877,6 +901,11 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 		print '</div>';
 	}
 
+	// Show the massaction checkboxes only when this page is not opend from the Extended POS
+	if ($massactionbutton && $contextpage != 'poslist') {
+		$selectedfields = $form->showCheckAddButtons('checkforselect', 1);
+	}
+
 	print '<div class="div-table-responsive">';
 	print '<table id="tablelines" class="tagtable nobottom liste'.($moreforfilter ? " listwithfilterbefore" : "").'">';
 
@@ -987,6 +1016,8 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 
 	include DOL_DOCUMENT_ROOT.'/core/tpl/extrafields_list_search_input.tpl.php';
 
+	print '<td class="liste_titre maxwidthsearch">&nbsp;</td>';
+
 	// Action column
 	print '<td class="liste_titre maxwidthsearch">';
 	$searchpicto = $form->showFilterButtons();
@@ -1055,6 +1086,7 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	$parameters = array('arrayfields'=>$arrayfields, 'param'=>$param, 'sortfield'=>$sortfield, 'sortorder'=>$sortorder);
 	$reshook = $hookmanager->executeHooks('printFieldListTitle', $parameters); // Note that $action and $object may have been modified by hook
 	print $hookmanager->resPrint;
+	print '<td></td>';
 	print_liste_field_titre($selectedfields, $_SERVER["PHP_SELF"], "", '', '', '', $sortfield, $sortorder, 'center maxwidthsearch ');
 	print "</tr>\n";
 
@@ -1062,7 +1094,7 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->third
 	if (count($tasksarray) > 0) {
 		// Show all lines in taskarray (recursive function to go down on tree)
 		$j = 0; $level = 0;
-		$nboftaskshown = projectLinesa($j, 0, $tasksarray, $level, true, 0, $tasksrole, $object->id, 1, $object->id, $filterprogresscalc, ($object->usage_bill_time ? 1 : 0), $arrayfields);
+		$nboftaskshown = projectLinesa($j, 0, $tasksarray, $level, true, 0, $tasksrole, $object->id, 1, $object->id, $filterprogresscalc, ($object->usage_bill_time ? 1 : 0), $arrayfields, $arrayofselected);
 	} else {
 		$colspan = 10;
 		if ($object->usage_bill_time) {