Patent ID: 7979009

Claim:
A developer supplying cartridge detachably mountable to an electrophotographic image forming apparatus main body, the developer supplying cartridge supplying a developer to a developing device for developing an electrostatic latent image having been formed on an electrophotographic photosensitive drum, the developer supplying cartridge comprising: a supply developer containing portion containing the developer; a developer supplying port for supplying the developer in the supply developer containing portion to the developing device via a supplied port of the developing device; and a supplying port shutter portion that opens and closes the developer supplying port, wherein the supplying port shutter portion includes: a housing member covering the developer supplying port; a cylindrical member which is rotatably disposed in the housing member and in which a through-hole corresponding to the developer supplying port is formed and which assumes, by rotation of the cylindrical member, a developer supply allowing position where the developer supplying port and the through-hole communicate with each other and a developer supply stopping position where the developer supplying port is closed; and a scraping member which is abutted on an outer circumferential surface of the cylindrical member to scrape off the developer adhering to the outer circumferential surface of the cylindrical member, which is rotated.