PURPOSE: To prevent the blocking of toner securely by composing the inside of a toner box with a composite body of rubber and resin having superior surface slippage.

CONSTITUTION: The inside of the toner box 1 consists of composite sheet 7 of rubber and resin having superior nonsticking property, lubricity, and wear resistance. Consequently, toner stored in th toner box 1 slips easily without sticking to the side plate and carried into the developer housing of a developing machine by a toner dispensing roll 2. Therefore, toner blocking is prevented securely even where the toner blocking is easy to occur because a deficient in the force of a toner stirring member.