A vehicular locking unit includes an engaging portion provided at an internal member of a vehicle to face an internal space in the vehicle, a hook portion, which is provided at an internal portion of the vehicle and which is selectively engaged with the engaging portion to attach the internal portion to the internal member in the internal space, and a locking mechanism, which is provided at the internal portion and which is coupled to the hook portion to selectively actuate the hook portion, whereby the hook portion is engaged with or disengaged from the engaging portion to attach the internal portion to the internal member or detach the same therefrom.