Abstract: The invention concerns a roller ski, each of which has a longitudinal support (1) equipped with a ski binding (5) to secure a ski boot, on which support (1), front and back, rubber-tired running wheels (3, 8, 9) are situated, one or more of which are provided with a return catch. In order to provide such roller skis with a braking device which is simple in design and construction and which can be operated by the skier by executing a movement of the body usually made during skiing, the invention provides for equipping, in particular, the rear running wheels (8), located on the side facing the adjacent roller ski with a brake lining (10) laterally mounted on the running wheel (8), which brake lining projects slightly inwardly above the inner lateral boundary (11) of the longitudinal support (1) which extends in the direction of movement.