This invention provides a safety mechanism as an improvement to a bowstring release device and operative to prevent the accidental discharge of an arrow drawn in the bow. The safety mechanism disclosed comprises a slidable cam which is adapted to actuate a lock pin into a position to block the movement of a trigger member of the bowstring release device. When the safety mechanism is moved in the opposite direction, the lock pin is allowed to move away from the position blocking trigger movement under pressure of a biasing spring, thus freeing the trigger to operate.
