[0100]When the end surface of the s

[0100]When the end surface of the shutter main body 593 is pressed and the main body side shutter 590 moves forward, the third protrusion 594C and the fourth protrusion 594D having positioned in the cutout 583B (refer to FIG. 15) come to be pressed by the facing portion 583 (refer to FIG. 16). As a result, the first swing piece 591 and the second swing piece 592 are elastically deformed, and thus the first protrusion 594A and the second protrusion 594B approach each other. As the first protrusion 594A and the second protrusion 594B approach, the protrusion 332 of the powder cartridge 200Y strikes these protrusions when the powder cartridge 200Y is pulled out. This results in that the main body side shutter 590 is closed when the powder cartridge 200Y is pulled out.