A color electrophotographic image forming apparatus to which a plurality of cartridges are detachably mounted to form a color image on a recording medium, the color electrophotographic image forming apparatus comprising: main body side positioning portions provided on a main body of the color electrophotographic image forming apparatus for the plurality of cartridges, respectively; a cartridge supporting member movable between an inside position of the main body and an outside position of the main body in a state of detachably supporting the plurality of cartridges having cartridge side electric contacts (500S; 510S; 600S) and cartridge side positioned portions, the cartridge supporting member is adapted to move among a first position where the plurality of cartridges are located at an image forming position at which the plurality of cartridges form images at the inside position, a second position where the plurality of cartridges are retracted from the first position at the inside position, and a third position where the plurality of cartridges are pulled out from the main body and are located at the outside position; a pressing member that is adapted to press the plurality of cartridges in association with a movement operation of the cartridge supporting member from the second position to the first position so as to press the cartridge side positioned portions onto the main body side positioning portions; main body side electric contacts (500H; 510H; 600H) provided on the main body for the plurality of cartridges, respectively, the main body side electric contacts (500H; 510H; 600H) being electrically connected to the cartridge side electric contacts (500S; 510S; 600S); and moving members (500; 510; 600) supporting the main body side electric contacts (500H; 510H; 600H) and movably provided on the main body, wherein, in a state in which the cartridge side positioned portions are pressed against the main body side positioning portions by a pressing force of the pressing member, the cartridge side electric contacts (500S; 510S; 600S) are directly and electrically connected to the main body side electric contacts (500H; 510H; 600H) so that the main body and the plurality of cartridges are electrically connected to each other, wherein the image forming apparatus further comprises a supporting member supporting the cartridge supporting member, being supported so as to be movable between the first position and the second position, characterized in that in case the cartridge supporting member is moved from the second position to the first position by the movement of the supporting member, the supporting member pushes out the moving members (500; 510; 600) to the cartridge side such that the cartridge side electric contacts (500S; 510S; 600S) are directly and electrically connected to the main body side electric contacts (500H; 510H; 600H). main body side positioning portions provided on a main body of the color electrophotographic image forming apparatus for the plurality of cartridges, respectively; a cartridge supporting member movable between an inside position of the main body and an outside position of the main body in a state of detachably supporting the plurality of cartridges having cartridge side electric contacts (500S; 510S; 600S) and cartridge side positioned portions, the cartridge supporting member is adapted to move among a first position where the plurality of cartridges are located at an image forming position at which the plurality of cartridges form images at the inside position, a second position where the plurality of cartridges are retracted from the first position at the inside position, and a third position where the plurality of cartridges are pulled out from the main body and are located at the outside position; a pressing member that is adapted to press the plurality of cartridges in association with a movement operation of the cartridge supporting member from the second position to the first position so as to press the cartridge side positioned portions onto the main body side positioning portions; main body side electric contacts (500H; 510H; 600H) provided on the main body for the plurality of cartridges, respectively, the main body side electric contacts (500H; 510H; 600H) being electrically connected to the cartridge side electric contacts (500S; 510S; 600S); and moving members (500; 510; 600) supporting the main body side electric contacts (500H; 510H; 600H) and movably provided on the main body, wherein, in a state in which the cartridge side positioned portions are pressed against the main body side positioning portions by a pressing force of the pressing member, the cartridge side electric contacts (500S; 510S; 600S) are directly and electrically connected to the main body side electric contacts (500H; 510H; 600H) so that the main body and the plurality of cartridges are electrically connected to each other, wherein the image forming apparatus further comprises a supporting member supporting the cartridge supporting member, being supported so as to be movable between the first position and the second position, characterized in that in case the cartridge supporting member is moved from the second position to the first position by the movement of the supporting member, the supporting member pushes out the moving members (500; 510; 600) to the cartridge side such that the cartridge side electric contacts (500S; 510S; 600S) are directly and electrically connected to the main body side electric contacts (500H; 510H; 600H).