Belt conveyance apparatus and image forming apparatus

A belt conveyance apparatus includes an endless belt, bearings, first and second adjustment members, and a stretching member. The first and second adjustment members are each rotatably supported by an outer circumferential surface of the bearings, face an end portion of the endless belt, and include a sliding surface. The stretching member includes a rotation unit. On a first end side or a second end side opposite to the first end side in a belt width direction, a distance from a first end portion which is an end portion of the rotation unit at a position closest to the sliding surface to the sliding surface is shorter than a distance from a second end portion at a position farthest from the sliding surface of the first adjustment member or the second adjustment member to the sliding surface.