PROBLEM TO BE SOLVED: To miniaturize a development frame and a development cartridge, and efficiently store the toner by specifying the construction of the development frame and the development cartridge. ;SOLUTION: A development frame 63A is provided with a development roller 12, a toner storage part 63a, and a coating roller 19. A toner supply opening 63Ae to supply the toner stored in the toner storage part 63a to the development roller 12, and a development roller mounting part to mount the development roller 12 along the toner supply opening are provided. Connection surfaces 63n which are connection surfaces to be connected to a toner frame 63B having the toner storage part 63a and provided on one end side and the other end side in the shorter side direction of the toner supply opening 63Ae along the longitudinal direction of the toner supply opening 63Ae, and a projecting part provided so as to be across the connection surfaces 63n are provided. A development cartridge can be miniaturized compared with the conventional construction. More toner can be stored with the development cartridge of the same size as the conventional one.;COPYRIGHT: (C)1999,JPO
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