Abstract: An intermittent impulse-type anti-lock braking device for bicycles and motorcycles, whose principal function is to prevent the front or the rear wheel from locking up when the rider actuates the brake lever. Said impulse-type intermittent device is made up of an eccentric wheel placed into motion by contact with the wheel of the vehicle. The eccentric wheel, connected to a lever, which has its fulcrum in, transmits the necessary alternating motion to the brake pad. In this manner, the pad is pressed against the rim of the wheel with an intermittent action instead of the continuous pressure that is provided by the braking systems which are currently on the market.