Patent ID: 8534664

Claim:
An image forming apparatus, comprising: an image forming portion; a housing in which the image forming portion is disposed to be housed; a placement portion on which a plurality of recording mediums can be placed; a feed roller that is disposed to oppose an upper surface of the placement portion, and feeds a topmost one of the recording mediums on a predetermined feed position to inside of the housing; a supply feed path in which the recording mediums are fed; a separation unit including a separation member that is detachably disposed at a predetermined mounting part and that is disposed to oppose the feed roller on a more downstream side in a feed direction of the feed position, and is configured to form a nip with the feed roller and separate the recording mediums; a position detection part configured to detect that a recording medium is disposed at a predetermined position on the placement portion, and the position detection part including: a detection member that can move between an initial position that is a position where the detection member protrudes upward from the placement portion and a retracted position that is a position retracted from the placement portion in a state in which the recording medium is disposed at the predetermined position on the placement portion; and a restricting member that is disposed at a stored position in the mounting part opposing the detection member to interpose the separation unit between the detection member and the restricting member, in a mounted state in which the separation unit is mounted to the mounting part, and is disposed at a restricting position that restricts the detection member moving from the initial position to the retracted position by abutting the detection member, in a detached state in which the separation unit is detached from the mounting part.