Image forming apparatus

An image forming apparatus comprising:

• an apparatus main body;
• a cartridge that can be detachably attached to an interior of the apparatus main body;
• an opening and closing member provided at the apparatus main body so as to open and close the interior;
• a positioning portion having a regulation surface that extends in an intersecting direction intersecting with an insertion direction of the cartridge in the interior, comes into contact with the cartridge and regulates a position of the cartridge in the insertion direction;
• and
• a support member that supports the cartridge, that is moved in the intersecting direction from a first position, in which the cartridge is retracted from a position in which an image can be formed, in conjunction with a closing operation of the opening and closing member, and that can be moved to a second position in which the cartridge is positioned at the position in which an image can be formed, wherein
• the cartridge has an engaging portion that engages with the support member,
• the engaging portion has a first surface extending in the insertion direction and a surface to be biased which is connected to the first surface and extends in the intersecting direction from an upstream side to a downstream side in the insertion direction,
• the support member has an engaged portion which is to be engaged with the engaging portion and a biasing member biasing the engaged portion in the intersecting direction,
• the engaged portion has a biasing surface extending in the intersecting direction from the upstream side to the downstream side in the insertion direction, and
• as a result of moving the support member in the intersecting direction by the closing operation, the surface to be biased is biased by the biasing surface, the cartridge is brought into contact with the positioning portion, and positioning of the cartridge is performed.