An image forming apparatus includes an image forming unit configured to form an image on a sheet, a housing configured to accommodate therein the image forming unit, a reading device, which is provided above the housing, and which is configured to read a content on the sheet, a protruding part, which protrudes from a side surface of the housing, and which is positioned within an outer edge of the reading device projected on a virtual horizontal plane when the protruding part is projected on the virtual horizontal plane, and a wireless board for a wireless communication, at least a part of the wireless board being arranged within the protruding part.