Abstract: An opening/closing body control device for vehicles that comprises a lock device and a control device. The control device comprises: a reverse control unit that executes reverse control that rotates a rotating member in reverse, after closing control has been completed; and a position detection unit that detects the rotation position of the rotating member, on the basis of the on/off state of a neutral switch. The position detection unit is capable of detecting whether the rotation position of the rotating member is in a closed area, a release area, or a neutral area. The reverse control unit does not execute reverse control if the rotation position of the rotating member is in the neutral area, when the closing control has been completed.