Abstract: A braking device comprising a base element (1) secured to the frame of the skate or board by the screw which fastens the axle of the rear wheels. A lever element (9) is rotatably mounted on an axis (7) integral with the base element, and wheel (14) is rotatably mounted at one end of the lever element. Braking is effected by the other end in the form of wings (10, 10') of the lever element rubbing against each rear wheel (15) of the skate or board. The wheel (14) presses on the ground when the skate or board tilts backward. The assembly is arranged so that the lever element returns to the rest position solely under the action of the weight of the wheel.