An image forming apparatus includes an image forming unit configured to form a measurement image on a recording sheet by using a color material, a fixing unit configured to fix the measurement image onto the recording sheet by heating the measurement image, a measurement unit configured to measure color values of the measurement image fixed on the recording sheet downstream of the fixing unit in a sheet conveyance direction of the recording sheet, a pressing member configured to press the recording sheet, on which the measurement image is formed, against the measurement unit, a selection unit configured to select a mode from among a first mode, in which the measurement image is measured with the pressing member pressing the recording sheet against the measurement unit, and a second mode, in which the measurement image is measured without the pressing member pressing the recording sheet against the measurement unit.