An image forming apparatus includes a sheet supporting portion, a regulating portion, a feeding portion, an image forming unit, a sheet detection unit, and a control unit. The control unit is configured to execute, in a state where an image forming job in which an image is formed by the image forming unit is interrupted, a drive processing of the feeding portion such that (a) the feeding portion is driven at a first timing if the regulating portion is not set to a moved state within a predetermined period of time from when the sheet detection unit has detected the sheet, and (b) the feed portion is driven at a second timing later than the first timing if the regulating portion is set to the moved state within the predetermined period of time from when the sheet detection unit has detected the sheet.