An apparatus utilized to lock a transportable vehicle, such as an all terrain vehicle (ATV) to a bed of a transporting vehicle generally comprising a locking bar assembly and a locking mechanism assembly. The locking bar assembly is securely mounted to the front of the transportable vehicle. The locking mechanism assembly mounts to a forward vertical wall inside the bed of the transporting vehicle and includes a guiding feature that aligns with the locking bar assembly. The transportable vehicle is guided into place until the locking bar assembly engages the locking mechanism assembly. A locking arm is locks the locking mechanism assembly to the lock bar assembly, thereby securely holding the transportable vehicle.