A cleaning device includes a cleaning member including a cleaning blade and a supporting plate for supporting the cleaning blade; a frame; first and second fixing portions, provided on the frame, for fixing the supporting plate in one end side and the other end side with respect to a longitudinal direction of the cleaning blade; a recessed portion provided on the frame at a position between the first and second fixing portions with respect to the longitudinal direction and recessed more than the first and second fixing portions in a direction away from the supporting plate; and a sealing material, applied onto the recessed portion within a range of the first and second fixing portions with respect to a perpendicular direction to the longitudinal direction, for sealing between the supporting plate fixed on the first and second fixing portions and the recessed portion.