Image forming apparatus

An image forming apparatus including a skeleton frame formed by combining hollow columns and cross beams and a specific member attached in the skeleton frame, wherein

• the skeleton frame has a pair of corner columns facing each other at an interval and includes a pair of support shafts projecting inward from respective inner side surfaces in the pair of corner columns, an opening/closing member that is rotatably supported on a lower end portion by the pair of support shafts and is capable of opening/closing a space between the pair of corner columns by rotating around the pair of support shafts as fulcrums, a hook member that is attached to the opening/closing member and projects inward in an opening/closing direction of the opening/closing member, and a pair of engaging shafts that are provided in a protruding manner on an inner side surface of a sheet metal member connected to each of the pair of corner columns and hold the opening/closing member in a closed state by engaging with the pair of hook members when the opening/closing member shifts from an open state to the closed state;
• the specific member is attached inside of the skeleton frame by moving horizontally from an outer side of the skeleton frame through between the pair of corner columns;
• and
• at least one of the pair of engaging shafts is also used as a guide portion that guides the specific member when the specific member is inserted into the skeleton frame from between the pair of corner columns.