An image forming apparatus includes: an image forming apparatus main body; an opening and closing part that is attached to the image forming apparatus main body in an openable and closeable manner; and a fixing device that is removably installed in the image forming apparatus main body to fix a developer image onto a recording medium, the opening and closing part being provided with an engaging portion to engage with an engaged portion defined on the image forming apparatus main body, and the engaging portion including a pressing part that presses the fixing device toward a proper position when a part of the fixing device is positioned in a movement locus of the engaging portion during a closing movement of the opening and closing part.