Belt device, transfer device, intermediate transfer device, and an image forming device thereof

Provided are a belt device, a transfer device, an intermediate transfer device, and an image forming device capable of preventing toner leakage due to interference between a belt abutting member which abuts against an end portion in the axial direction of a belt due to movement in the axial direction of the belt and which moves in the axial direction together with the belt, and a seal member in a belt device including the belt abutting member, a cleaning member, and the seal member. The belt device (60) comprises a belt (3), the belt abutting member (30) movable in the axial direction of a rotating shaft (5a), the cleaning member (21) for removing deposits on the surface of the belt, and the seal member (22) configured at an end portion of the cleaning member in the axial direction, and when the belt abutting member comes closest to the end portion in the axial direction of the seal member, the belt abutting member and the seal member are in a position relation that the belt abutting member and the seal membe