An image forming apparatus includes an image forming unit configured to form an image on a sheet, a reversing unit configured to convey a sheet conveyed from the image forming unit in a first direction, stop the conveyance, and then convey the sheet in a second direction, which is opposite to the first direction, an image detection unit disposed to detect at least a portion of the image on the sheet stopped by the reversing unit, and a control unit configured to control the reversing unit and the image detection unit. The control unit is configured to detect the image on the sheet by the image detection unit while the sheet conveyance is stopped by the reversing unit.