diff --git a/List/List.c b/List/List.c
index b4553da..2f22f1d 100644
--- a/List/List.c
+++ b/List/List.c
@@ -140,6 +140,26 @@ void insert_inside_List(THIS(List), void * data, size_t data_size, int index){
 
 }
 
+/**
+ * Check if data_to_find exist in list
+ * @param this THIS(List)
+ * @param data_to_find pointer to data you want to find inside
+ * @param compare a compare function, return true or false and takes two void * pointers
+ * @return true or false if the element is within the list or not
+ */
+int contains_List(THIS(List), void * data_to_find, int (*compare)(void *, void *)){
+	Element * current = this->head;
+
+	while (current != NULL){
+		if (compare(data_to_find, current->data)){
+			return 1;
+		}
+		current = current->next;
+	}
+
+	return 0;
+}
+
 void remove_head_List(THIS(List)){
 	DELETE(this->head);
 }
@@ -170,7 +190,8 @@ List *_init_List(){
 			 clear_custom,
 			 clear,
 			 remove_head,
-			 remove_tail
+			 remove_tail,
+			 contains
 	)
 	return l;
 }
diff --git a/List/List.h b/List/List.h
index 6af0f0d..0c9511b 100644
--- a/List/List.h
+++ b/List/List.h
@@ -29,6 +29,7 @@ struct o_List {
 	PUBLIC void* (*get_element_data)(_THIS(List), int index);
 
 	PUBLIC int (*get_size)(_THIS(List));
+	PUBLIC int (*contains)(_THIS(List), void * data_to_find, int (*compare)(void *, void *));
 
 	PUBLIC void (*set_custom_free)(_THIS(List), void (*custom_free)(void *));
 	PUBLIC void (*insert_inside)(_THIS(List), void * data, size_t data_size, int index);