An image forming device for preventing the lowering of the cleaning performance due to rolling up of the blade-like member, by reducing a force of rolling up both end parts of the blade-like member. The blade-like member is provided which presses the contact part extending in parallel in the axial direction of the support member against at least one support member with a belt-like member wound therearound and having the roller shape, with the belt-like member having an endless form interposed therebetween. Provision of tapered parts sloped with outer diameters reduced toward both end parts in the axial direction at both end parts in the axial direction of the one support member having a roller shape, makes the contact pressure of the contact parts at the blade-like member against the one support member having the roller shape, smaller at both end parts than at the central part in the axial direction of the support member.