Patent ID: 8798503

Claim:
An image forming apparatus comprising: an apparatus body including a first body-side engaging portion; an image formation unit configured to form an image on a recording sheet; and a belt unit including: a belt frame; a pair of rollers supported by the belt frame; an endless belt extending between the rollers, the rollers being spaced apart in a belt extending direction; a first belt-side engaging portion configured to engage the first body-side engaging portion; and an elastic member configured to urge one of the rollers in a direction away from the other one of the rollers to apply a tension to the endless belt and to urge the first belt-side engaging portion against the first body-side engaging portion in a specified direction away from the one of the rollers, wherein the first belt-side engaging portion includes a first guide surface, and wherein, as the first belt-side engaging portion engages the first body-side engaging portion, the first body-side engaging portion presses the first guide surface such that the first belt-side engaging portion moves toward the elastic member.