This device is designed to perform friction experiments on a horizontal or inclined plane. The inclination plane adjustable between 0 and 45 ° is made of mild steel, it has a length of one meter and its useful surface is rectified. An incorporated protractor indicates the angle of inclination. The plane can be blocked by means of a simple hand lever. A truck that can be equipped with skids of different materials or bearings, is loaded with masses and is subjected to forces exerted by tared masses.