Vehicle apparatus for a vehicle including a chain guide device which can be easily mounted to the vehicle with a reduced number of parts. The chain, guide device for guiding a chain in the vehicle includes a main frame and a rear swing arm extending rearward from the main frame. The chain guide device also includes a stay extending downward from the rear swing arm, a sectionally U-shaped plate member fastened to the stay using fastening members, and a chain guide member mounted in the plate member. The chain guide member has a chain guide hole through which the chain passes through to be guided. The chain guide member is fixed by fitting the lower surface and the right and left side surfaces of the chain guide member to the plate member and by fitting the upper surface of the chain guide member to the stay.