A belt anchor comprises an anchor portion which changes the extending direction of a belt body toward a vehicle front, a bolt which supports the anchor portion, and a nut which fastens the bolt. The belt anchor is fixed to a lift gate inner and a second reinforcement at a position which is located near a pivotal axis of a hinge. Accordingly, a seatbelt device of a vehicle which can ensure both the properly-large slant angle of the belt body and the support strength of the belt anchor, keeping appropriate flexibility of the vehicle layout, can be provided.