An image forming apparatus comprising: an apparatus main body to which a cartridge that has a first rotating member is detachably mountable and to which a unit is detachably mountable, wherein the unit has a second rotating member, a first frame member and a supporting member arranged to be rotated as to the first frame member via a supporting shaft and rotatably supporting the second rotating member; and a first pressing member arranged to press a first force receiving portion of the supporting member, wherein the first pressing member is configured to move the second rotating member from a contact position where the second rotating member is in contact with the first rotating member to a first separated position where the second rotating member is separated from the first rotating member, by moving while pressing the supporting member, the image forming apparatus characterized by further comprising: a second pressing member arranged to press a second force receiving portion of the supporting member, wherein the second pressing member is capable of moving between a mounting/detaching restriction position where mounting/detaching of the cartridge to the apparatus main body is restricted, and a mounting/detaching allowing position where mounting/detaching of the cartridge to the apparatus main body is allowed, wherein the second pressing member is configured to move the unit to a second separated position distanced from the first rotating member by moving from the mounting/detaching restriction position to the mounting/detaching allowing position while pressing the supporting member, so the cartridge is in an extractable state from the apparatus main body, and wherein, when viewed in a rotational axis direction of the supporting shaft, the second force receiving portion is disposed on one side of the supporting shaft which is opposite to the other side of the supporting shaft on which the first force receiving portion is disposed. an apparatus main body to which a cartridge that has a first rotating member is detachably mountable and to which a unit is detachably mountable, wherein the unit has a second rotating member, a first frame member and a supporting member arranged to be rotated as to the first frame member via a supporting shaft and rotatably supporting the second rotating member; and a first pressing member arranged to press a first force receiving portion of the supporting member, wherein the first pressing member is configured to move the second rotating member from a contact position where the second rotating member is in contact with the first rotating member to a first separated position where the second rotating member is separated from the first rotating member, by moving while pressing the supporting member, the image forming apparatus characterized by further comprising: a second pressing member arranged to press a second force receiving portion of the supporting member, wherein the second pressing member is capable of moving between a mounting/detaching restriction position where mounting/detaching of the cartridge to the apparatus main body is restricted, and a mounting/detaching allowing position where mounting/detaching of the cartridge to the apparatus main body is allowed, wherein the second pressing member is configured to move the unit to a second separated position distanced from the first rotating member by moving from the mounting/detaching restriction position to the mounting/detaching allowing position while pressing the supporting member, so the cartridge is in an extractable state from the apparatus main body, and wherein, when viewed in a rotational axis direction of the supporting shaft, the second force receiving portion is disposed on one side of the supporting shaft which is opposite to the other side of the supporting shaft on which the first force receiving portion is disposed. a second pressing member arranged to press a second force receiving portion of the supporting member, wherein the second pressing member is capable of moving between a mounting/detaching restriction position where mounting/detaching of the cartridge to the apparatus main body is restricted, and a mounting/detaching allowing position where mounting/detaching of the cartridge to the apparatus main body is allowed, wherein the second pressing member is configured to move the unit to a second separated position distanced from the first rotating member by moving from the mounting/detaching restriction position to the mounting/detaching allowing position while pressing the supporting member, so the cartridge is in an extractable state from the apparatus main body, and wherein, when viewed in a rotational axis direction of the supporting shaft, the second force receiving portion is disposed on one side of the supporting shaft which is opposite to the other side of the supporting shaft on which the first force receiving portion is disposed.