A transfer unit includes: a plurality of rollers; an image forming section which performs formation of a toner image in accordance image information and transfer of the toner image; an intermediate transferring belt to which the toner image is transferred from the image forming section; and a contact member which comes in contact with a part of the cleaning unit at a position apart from the intermediate transferring belt to perform positioning of the cleaning unit, and the cleaning unit includes: a cleaning mechanism which cleans the front surface side of the intermediate transferring belt; a positioning shaft which fits into the positioning portion formed in the apparatus main body, the positioning shaft being rotatable in such a direction as to come in contact with or separate apart from the transfer unit; and an abutting member which comes in contact with the contact member of the transfer unit.