Image forming apparatus

An image forming apparatus comprising:

• a fixing unit attached to an apparatus main body of the image forming apparatus;
• a first support portion fixed to the apparatus main body and configured to fit with and position a first supported portion, which is an end of the fixing unit, in an up-down direction and to support the first supported portion movably in insertion direction of the fixing unit toward an attachment position;
• a second support portion provided movably in the up-down direction with respect to the apparatus main body and configured to fit with and position a second supported portion, which is another end of the fixing unit, in the up-down direction and to support the second supported portion movably in the insertion direction;
• and
• a height adjustment portion configured to adjust height position of the fixing unit by moving the second support portion in the up-down direction, wherein
• the first support portion includes a vertical surface facing the first supported portion and extending in the up-down direction, and the vertical surface has a projection at an end thereof on foreside of the insertion direction, the projection projecting from the vertical surface in a first direction of going away from the vertical surface.