Braking device for roller skates, skateboards, or the like, having a roller support in which a roller is mounted axially movable between a first freely rotatable position and a second braked position. The braking device includes an actuatable brake unit is supported relative to the roller support and the brake actuation force is produced from the torque of the roller via a clutch unit having a downstream transmission unit, the clutch unit being open in the first position and closed in the second position.