A transferring unit of an image forming apparatus comprising: a contacted member; a rotating body that is alternately contacted with and spaced away from the contacted member; in a single body, a first and a second rotating body transporting member (110,120) where a supporting part(112,122) to rotatably support the rotating body, a contacting external force receiving part (113,123) to receive a contacting external force that contacts the rotating body with the contacted member, and a spacing external force receiving part (115,125) to receive a spacing external force that spaces the rotating body away from the contacted member are formed, the first and the second rotating body transporting members supporting opposite end portions of a rotating shaft of the rotating body, respectively; a driver that drives the first rotating body transporting member and a position regulating shaft which is inserted into the first and the second rotating body transporting members and is rotatable on a position regulating axis parallel with the rotating shaft of the rotating body, characterized in that the first rotating body transporting member includes a first shaft inserting part having a first inserting space where a first surface contacting part of the position regulating shaft is inserted and a first contacting protrusion formed in an inner circumference of the first inserting space to come in and out of contact with the first surface contacting part, configured to contact a first surface contacting part of the position regulating shaft to} rotate the position regulating shaft after the first rotating body transporting member has rotated through an angle (θ); and the second rotating body transporting member is arranged to rotate as a single body with the position regulating shaft. a contacted member; a rotating body that is alternately contacted with and spaced away from the contacted member; in a single body, a first and a second rotating body transporting member (110,120) where a supporting part(112,122) to rotatably support the rotating body, a contacting external force receiving part (113,123) to receive a contacting external force that contacts the rotating body with the contacted member, and a spacing external force receiving part (115,125) to receive a spacing external force that spaces the rotating body away from the contacted member are formed, the first and the second rotating body transporting members supporting opposite end portions of a rotating shaft of the rotating body, respectively; a driver that drives the first rotating body transporting member and a position regulating shaft which is inserted into the first and the second rotating body transporting members and is rotatable on a position regulating axis parallel with the rotating shaft of the rotating body, characterized in that the first rotating body transporting member includes a first shaft inserting part having a first inserting space where a first surface contacting part of the position regulating shaft is inserted and a first contacting protrusion formed in an inner circumference of the first inserting space to come in and out of contact with the first surface contacting part, configured to contact a first surface contacting part of the position regulating shaft to} rotate the position regulating shaft after the first rotating body transporting member has rotated through an angle (θ); and the second rotating body transporting member is arranged to rotate as a single body with the position regulating shaft.