An image forming apparatus is provided that includes a first casing disposed on a first side in a first direction, and a second casing disposed on a second side in the first direction, the second casing containing an image reading unit, a driver driving the image reading unit, and a driver compartment configured to accommodate the driver and disposed at an end portion of the second casing on a third side in a second direction perpendicular to the first direction, the first casing containing an image forming unit, a control board electrically connected with the driver and the image reading unit and configured to control the image reading unit, and a board compartment configured to accommodate at least a part of the control board and disposed at an end portion of the first casing on a fourth side opposite to the third side in the second direction.