An image forming apparatus including: an apparatus main body; a discharge roller portion that discharges sheet members; a tray being capable of stacking the sheet members discharged from the discharge roller portion; and a curl correcting member being capable of arranging on a downstream side in a sheet member carrying direction of the discharge roller portion, brought into contact with the sheet member having a curl convex upwardly and discharged from the discharge roller portion, and having a correcting face for exerting a correcting force to a side of correcting the curl. The curl of the sheet member is corrected by the curl correcting member when the curl correcting member is arranged on the downstream side of the discharge roller portion, and is not corrected by the curl correcting member when the curl correcting member is not arranged on the downstream side of the discharge roller portion.