diff --git a/app/scodoc/sco_saisie_notes.py b/app/scodoc/sco_saisie_notes.py
index 7ea4b735ab..4583adce88 100644
--- a/app/scodoc/sco_saisie_notes.py
+++ b/app/scodoc/sco_saisie_notes.py
@@ -1049,7 +1049,19 @@ def saisie_notes(evaluation_id, group_ids=[]):
             alone=True,
         )
     )
-    H.append("""</td></tr></table></div>""")
+    H.append("""</td><td style="padding-left: 35px;"><button class="btn_masquer_DEM">Masquer les DEM</button></td></tr></table></div>""")
+    H.append("""<style>
+		.btn_masquer_DEM{
+			font-size: 12px;
+		}
+		body.masquer_DEM .btn_masquer_DEM{
+			background: #009688;
+			color: #fff;
+		}
+		body.masquer_DEM .etud_dem{
+			display: none !important;
+		}
+	</style>""")
 
     # Le formulaire de saisie des notes:
     destination = url_for(
diff --git a/app/static/js/saisie_notes.js b/app/static/js/saisie_notes.js
index 747d09fe2b..4dc782c93d 100644
--- a/app/static/js/saisie_notes.js
+++ b/app/static/js/saisie_notes.js
@@ -5,6 +5,7 @@ $().ready(function () {
     $("#formnotes .note").bind("blur", valid_note);
 
     $("#formnotes input").bind("paste", paste_text);
+	$(".btn_masquer_DEM").bind("click", masquer_DEM);
 
 });
 
@@ -92,6 +93,7 @@ function paste_text(e) {
     var data = clipb.getData('Text');
     var list = data.split(/\r\n|\r|\n|\t| /g);
     var currentInput = event.currentTarget;
+	var masquerDEM = document.querySelector("body").classList.contains("masquer_DEM");
 
     for (var i = 0; i < list.length; i++) {
         currentInput.value = list[i];
@@ -99,7 +101,15 @@ function paste_text(e) {
         evt.initEvent("blur", false, true);
         currentInput.dispatchEvent(evt);
         var sibbling = currentInput.parentElement.parentElement.nextElementSibling;
-        while (sibbling && sibbling.style.display == "none") {
+        while (
+			sibbling && 
+			(
+				sibbling.style.display == "none" || 
+				(
+					masquerDEM && sibbling.classList.contains("etud_dem")
+				)
+			) 
+		) {
             sibbling = sibbling.nextElementSibling;
         }
         if (sibbling) {
@@ -112,3 +122,7 @@ function paste_text(e) {
         }
     }
 }
+
+function masquer_DEM(){
+	document.querySelector("body").classList.toggle("masquer_DEM");
+}