A powered device for a vehicle sliding member includes a base member, a shaft rotatably supported on the base member, a drive source, a speed reduction mechanism, an output drum rotatably supported on the base member through the shaft, a clutch mechanism which includes a rotor rotatably and coaxially disposed on the shaft, a generally cylindrical field core disposed on the rotor, and an armature which is disposed on the shaft so as to be rotatable about and moveable in an axial direction of the shaft, a first stop which limits axial displacement of the rotor relative to the shaft, and a second stop which limits axial displacement of the field core relative to the rotor.