An electrophotographic image forming apparatus includes a cartridge for forming a visible toner image. The cartridge includes a development chamber having a toner inlet through which toner is supplied into the development chamber, a development roller provided in the development chamber, and a supply roller provided in the development chamber that supplies toner to the development roller. The cartridge further includes a first toner transporting member that transports toner supplied through the toner inlet in an axial direction of the supply roller, and a toner supply guide that is disposed between the first toner transporting member and the supply roller and includes a slit which has a length in the axial direction and through which toner is dropped onto the supply roller. The toner supply guide is downwardly inclined in the axial direction.