Patent ID: 7283773

Claim:
An image forming apparatus comprising a toner container and an image forming apparatus main body in which the toner container is installed, the toner container comprising: a toner container main body having a predetermined length and which accommodates toner; a mixer which stirs the toner in the toner container main body; a discharge port through which the toner in the toner container main body is discharged from the toner container main body; a screw having one end projected from one end surface of the toner container main body, the screw being rotated to convey the toner from the toner container main body to the discharge port; a coupling portion provided at the one end of the screw and which rotates with the screw; and a protruding portion provided on an outer peripheral surface of the coupling portion, the image forming apparatus main body comprising: a driving portion which rotates the screw; a pushed portion which is pushed by the protruding portion rotating with the screw; a detecting portion which detects that the protruding portion is pushing the pushed portion; and a determining portion which determines the type of the toner container on the basis of the detection by the detecting portion.