diff --git a/assets/css/pages/groups/sections/membershipBlock.css b/assets/css/pages/groups/sections/membershipBlock.css
new file mode 100644
index 00000000..02d7c5c9
--- /dev/null
+++ b/assets/css/pages/groups/sections/membershipBlock.css
@@ -0,0 +1,9 @@
+/**
+ * Membership block stylesheet
+ *
+ * @author Pierre HUBERT
+ */
+
+.reject-group-invitation-link {
+    color: #f56954;
+}
\ No newline at end of file
diff --git a/assets/js/components/groups/interface.js b/assets/js/components/groups/interface.js
index ba50ae7d..64a3db58 100644
--- a/assets/js/components/groups/interface.js
+++ b/assets/js/components/groups/interface.js
@@ -112,4 +112,22 @@ ComunicWeb.components.groups.interface = {
         ComunicWeb.common.api.makeAPIrequest(apiURI, params, true, callback);
     },
 
+    /**
+     * Respond to a group invitation
+     * 
+     * @param {Number} id The ID of the target group
+     * @param {Boolean} accept Specify whether the invitation was
+     * accepted or not
+     * @param {Function} callback
+     */
+    respondInvitation: function(id, accept, callback) {
+        //Perform the request over the API
+        var apiURI = "groups/respond_invitation";
+        var params = {
+            id: id,
+            accept: accept
+        };
+        ComunicWeb.common.api.makeAPIrequest(apiURI, params, true, callback);
+    },
+
 };
\ No newline at end of file
diff --git a/assets/js/pages/groups/pages/forbidden.js b/assets/js/pages/groups/pages/forbidden.js
index 72fb7e10..cddd691b 100644
--- a/assets/js/pages/groups/pages/forbidden.js
+++ b/assets/js/pages/groups/pages/forbidden.js
@@ -96,6 +96,6 @@ ComunicWeb.pages.groups.pages.forbidden = {
 
         //Append membership block (if the user is signed in)
         if(signed_in())
-            ComunicWeb.pages.groups.sections.membershipBlock.display(result);
+            ComunicWeb.pages.groups.sections.membershipBlock.display(result, boxBody);
     },
 }
\ No newline at end of file
diff --git a/assets/js/pages/groups/sections/membershipBlock.js b/assets/js/pages/groups/sections/membershipBlock.js
index 50f47e74..ec9c1ab8 100644
--- a/assets/js/pages/groups/sections/membershipBlock.js
+++ b/assets/js/pages/groups/sections/membershipBlock.js
@@ -6,42 +6,118 @@
 
 ComunicWeb.pages.groups.sections.membershipBlock = {
 
-    /**
-     * Display membership block
-     * 
-     * @param {Object} info Information about the membership
-     * @param {HTMLElement} target The target where the block will be applied
-     */
-    display: function(info, target){
-        
-        //Membership container
-        var container = createElem2({
-            appendTo: target, 
-            type: "div"
-        });
+	/**
+	 * Display membership block
+	 * 
+	 * @param {Object} info Information about the membership (= basic info about the group)
+	 * @param {HTMLElement} target The target where the block will be applied
+	 */
+	display: function(info, target){
+		
+		//Membership container
+		var container = createElem2({
+			appendTo: target, 
+			type: "div"
+		});
 
-        //Check if the user is an administrator / moderator / member
-        if(info.membership == "administrator")
-            return createElem2({
-                appendTo: container,
-                type: "span",
-                innerHTML: "<i class='fa fa-check'></i> Administrator"
-            });
-        
-        if(info.membership == "moderator")
-            return createElem2({
-                appendTo: container,
-                type: "span",
-                innerHTML: "<i class='fa fa-check'></i> Moderator"
-            });
-        
-        if(info.membership == "member")
-            return createElem2({
-                appendTo: container,
-                type: "span",
-                innerHTML: "<i class='fa fa-check'></i> Member"
-            });
+		//Check if the user is an administrator / moderator / member
+		if(info.membership == "administrator")
+			return createElem2({
+				appendTo: container,
+				type: "span",
+				innerHTML: "<i class='fa fa-check'></i> Administrator"
+			});
+		
+		if(info.membership == "moderator")
+			return createElem2({
+				appendTo: container,
+				type: "span",
+				innerHTML: "<i class='fa fa-check'></i> Moderator"
+			});
+		
+		if(info.membership == "member")
+			return createElem2({
+				appendTo: container,
+				type: "span",
+				innerHTML: "<i class='fa fa-check'></i> Member"
+			});
+		
+		//Check if the user has been invited
+		if(info.membership == "invited"){
+			var invitedContainer = createElem2({
+				appendTo: container,
+				type: "span",
+				innerHTML: "<i class='fa fa-question'></i> Invited "
+			});
 
-    }
+			//Offer the user to accept the invitation
+			var acceptInvitation = createElem2({
+				appendTo: invitedContainer,
+				type: "span",
+				class: "a",
+				innerHTML: "Accept"
+			});
+
+			add_space(invitedContainer);
+
+			//Offer the user to reject
+			var rejectInvitation = createElem2({
+				appendTo: invitedContainer, 
+				type: "span",
+				class: "a reject-group-invitation-link",
+				innerHTML: "Reject"
+			});
+
+			/**
+			 * Respond to a group invitation
+			 * 
+			 * @param {Boolean} accept Set whether the invation was accepted or not
+			 */
+			var respondInvitation = function(accept){
+
+				//Perform the request over the server
+				ComunicWeb.components.groups.interface.respondInvitation(info.id, accept, function(result){
+
+					//Check for errors
+					if(result.error)
+						notify("An error occurred while trying to respond to the invitation!", "danger");
+					
+					//Refresh the component
+					emptyElem(container);
+					ComunicWeb.components.groups.interface.getInfo(info.id, function(result){
+
+						//Check for errors
+						if(result.error)
+							return notify("Could not refresh membership information!", "danger");
+						
+						//Display the component again
+						ComunicWeb.pages.groups.sections.membershipBlock.display(result, container);
+
+					});
+
+				});
+
+			}
+
+			//Accept invitation
+			acceptInvitation.addEventListener("click", function(e){
+				//Accept the invitation
+				respondInvitation(true);
+			});
+
+			//Reject invitation
+			rejectInvitation.addEventListener("click", function(e){
+
+				ComunicWeb.common.messages.confirm("Do you really want to reject this invitation ?", function(r){
+					if(!r) return;
+
+					//Reject the invitation
+					respondInvitation(false);
+				})
+
+			});
+		}
+
+	}
 
 };
\ No newline at end of file
diff --git a/system/config/dev.config.php b/system/config/dev.config.php
index 54f97452..28b44c41 100644
--- a/system/config/dev.config.php
+++ b/system/config/dev.config.php
@@ -226,6 +226,7 @@ class Dev {
 
 				//Groups sections
 				"css/pages/groups/sections/header.css",
+				"css/pages/groups/sections/membershipBlock.css",
 
 
 			//Settings page