A cartridge comprising: a frame (115, 125) including a first end in a first direction, a first positioning portion (115E1) disposed on the first end, and a first rotation stopping portion (115K1) disposed on the first end, wherein the first positioning portion (115E1) includes a first surface extending in the first direction, and the first rotation stopping portion (115K1) includes a second surface extending in the first direction; a first side member attached to the first end, wherein the first side member includes a first to-be-positioned portion (116E1) engaged with the first positioning portion (115E1) so as to contact the first surface and a first rotation to-be-stopped portion (116K1) engaged with the first rotation stopping portion (115K1) so as to contact the second surface, and wherein movement of the first side member in a direction intersecting the first direction is restricted by engagement of the first to-be-positioned portion (116E1) with the first positioning portion (115E1), and rotation of the first side member about the first positioning portion (115E1) is restricted by engagement of the first rotation to-be-stopped portion (116K1) with the first rotation stopping portion (115K1); and a first screw fastened to the first positioning portion (115E1) or the first rotation stopping portion (115K1), wherein the first screw is disposed to hold the first side member between the frame (115, 125) and the first screw, wherein at least either one of (i) the first to-be-positioned portion (116E1) and the first positioning portion (115E1) and (ii) the first rotation to-be-stopped portion (116K1) and the first rotation stopping portion (115K1) are adhesively bonded with adhesive. a frame (115, 125) including a first end in a first direction, a first positioning portion (115E1) disposed on the first end, and a first rotation stopping portion (115K1) disposed on the first end, wherein the first positioning portion (115E1) includes a first surface extending in the first direction, and the first rotation stopping portion (115K1) includes a second surface extending in the first direction; a first side member attached to the first end, wherein the first side member includes a first to-be-positioned portion (116E1) engaged with the first positioning portion (115E1) so as to contact the first surface and a first rotation to-be-stopped portion (116K1) engaged with the first rotation stopping portion (115K1) so as to contact the second surface, and wherein movement of the first side member in a direction intersecting the first direction is restricted by engagement of the first to-be-positioned portion (116E1) with the first positioning portion (115E1), and rotation of the first side member about the first positioning portion (115E1) is restricted by engagement of the first rotation to-be-stopped portion (116K1) with the first rotation stopping portion (115K1); and a first screw fastened to the first positioning portion (115E1) or the first rotation stopping portion (115K1), wherein the first screw is disposed to hold the first side member between the frame (115, 125) and the first screw, wherein at least either one of (i) the first to-be-positioned portion (116E1) and the first positioning portion (115E1) and (ii) the first rotation to-be-stopped portion (116K1) and the first rotation stopping portion (115K1) are adhesively bonded with adhesive.