To deliver a sheet cut by a sheet cutting means for cutting a belt-like rolled sheet into a predetermined size to a paper delivery section in a constant, satisfactory manner irrespective of the paper delivery condition or the like.

In an image forming apparatus, a sheet delivery port to deliver a cut sheet with a toner image formed thereon is formed in a front face of an apparatus casing, and a paper delivery section to accommodate the sheet delivered from the sheet delivery port is provided below the sheet delivery port. The paper delivery section extends parallel to and along the front face, and an opening part to insert the sheet therein is formed in an upper end thereof. A guide member 16 to guide the sheet delivered is disposed between the sheet delivery port and the opening part, and the guide member is variable in protrusion from the front face. A control unit 53 controls the protrusion of the guide member according to the size of the sheet based on a detected signal from a first detection means for detecting residual quantity of rolled sheet and a second detection means for measuring the moisture of the sheet.