diff --git a/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java b/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
index 63a20f6..c2c9ab5 100644
--- a/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
+++ b/be-graphes-model/src/main/java/org/insa/graphs/model/Path.java
@@ -184,11 +184,21 @@ public class Path {
      * </ul>
      *
      * @return true if the path is valid, false otherwise.
-     * @deprecated Need to be implemented.
      */
     public boolean isValid() {
-        // TODO:
-        return false;
+        
+        if (this.isEmpty()) { return true; }
+        if (this.size() == 1 && this.arcs.isEmpty()) { return true; }
+        if (this.arcs.get(0).getOrigin() != this.origin) { return false; }
+
+        Boolean good = true;  
+        for (int i = 0; i < this.arcs.size() - 1; i++) {
+            if (this.arcs.get(i).getDestination() != this.arcs.get(i+1).getOrigin()) {
+                good = false;
+            }
+        }
+
+        return good;
     }
 
     /**