A developing means and a toner cartridge is used in such a developing device in an image forming

Laser printer, rotation of the toner cartridge stirring portion (32) in (30), and stirring the toner supplied to the toner supply opening (. 30A), the final electronic image is formed photocopying process. A developing apparatus, which was stirred with a binding portion rotatably inserted into an opening provided in the toner cartridge (30) (230) concave portion (302) and a flange member (304). Also incorporated in a recessed portion (302) and a flange member (304) mounted in close contact with the soft sealing material (306). Between the soft sealing material and a flange member provided with a gasket interposed member (308), and the flange member (304) in contact with the washer member (308) is provided uneven portion (305) contact surfaces.