A cleaning device comprising: a cleaning housing; a cleaning blade provided in the cleaning housing and brought into press-contact with a peripheral surface of a photosensitive drum to scrape off remaining toner from the peripheral surface, a toner image being formed on the peripheral surface; a cleaning roller provided in the cleaning housing at an upstream side of a rotation direction of the photosensitive drum from the cleaning blade, and brought into press-contact with the peripheral surface of the photosensitive drum to abrade the peripheral surface of the photosensitive drum by an abrasive included in the scraped-off remaining toner; and a discharge screw provided in the cleaning housing below the cleaning roller to discharge the scraped-off remaining toner outside the cleaning housing as waste toner, wherein, in the cleaning housing, a toner crushing wire, which swings along an inner wall of the cleaning housing facing a peripheral surface of the cleaning roller in non-contact with the inner wall of the cleaning housing and crushes the scraped-off remaining toner, is disposed so as to extend along a rotating shaft of the cleaning roller, characterized in that elastic portions are provided at both end sides of the toner crushing wire in a longitudinal direction, and a guide portion, which reciprocates the toner crushing wire in the longitudinal direction thereof through pressure deformation of the elastic portions due to a swing operation of the toner crushing wire, is provided to the inner wall of the cleaning housing facing one end of a rotating shaft direction of the cleaning roller. a cleaning housing; a cleaning blade provided in the cleaning housing and brought into press-contact with a peripheral surface of a photosensitive drum to scrape off remaining toner from the peripheral surface, a toner image being formed on the peripheral surface; a cleaning roller provided in the cleaning housing at an upstream side of a rotation direction of the photosensitive drum from the cleaning blade, and brought into press-contact with the peripheral surface of the photosensitive drum to abrade the peripheral surface of the photosensitive drum by an abrasive included in the scraped-off remaining toner; and a discharge screw provided in the cleaning housing below the cleaning roller to discharge the scraped-off remaining toner outside the cleaning housing as waste toner, wherein, in the cleaning housing, a toner crushing wire, which swings along an inner wall of the cleaning housing facing a peripheral surface of the cleaning roller in non-contact with the inner wall of the cleaning housing and crushes the scraped-off remaining toner, is disposed so as to extend along a rotating shaft of the cleaning roller, characterized in that elastic portions are provided at both end sides of the toner crushing wire in a longitudinal direction, and a guide portion, which reciprocates the toner crushing wire in the longitudinal direction thereof through pressure deformation of the elastic portions due to a swing operation of the toner crushing wire, is provided to the inner wall of the cleaning housing facing one end of a rotating shaft direction of the cleaning roller.