Abstract: The present invention relates to a device for removably fixing one element on another, by interlocking, particularly for fixing an instrument panel assembly on the dashboard of an automobile, said device comprising a clip to be fastened to a first element and a pin with a shouldered head to be fastened to a second element which is to be fixed to said first element, said clip being constituted by a frame inside which are connected two resilient lips, defining a central housing for the penetration of said pin and at least one lateral housing for receiving a member for spacing said lips apart in order to release said pin, said lip-spacing member being rotatably mounted on said frame.