Patent ID: 8744335

Claim:
An image forming apparatus comprising: an image forming section configured to form an image on a sheet; a sheet feeding section configured to contain a plurality of sheets and feed the contained sheets one by one to the image forming section; a re-feeding section configured to, in a case where double-sided printing is to be performed, re-feed a sheet fed from the sheet feeding section and having an image formed on a first side thereof by the image forming section to the image forming section so as to have an image formed on a second side thereof; and a control section configured to: in a case where double-sided printing is to be performed on a sheet, which is posterior in page order to a sheet for single-sided printing, perform a passing control where the sheet for double-sided printing is fed by the sheet feeding section before the sheet for single-sided printing and a first side of the sheet for double-sided printing is subjected to image formation prior to the sheet for single-sided printing; and in a case where an image forming condition should be changed between an image forming on the sheet for double-sided printing and an image forming on the sheet for single-sided printing, while the passing control is to be performed, prevent the passing control.