An image forming apparatus includes: a fixing device that forms a fixing nip by bringing a pressure member into pressure contact with a peripheral surface of a heating rotator and fixes an unfixed toner image; an acceptor that accepts a specified laminate processing mode for performing laminate processing by feeding a laminate; and a hardware processor that controls a heating rotator to idle for a predetermined time and then controls to perform the laminate processing, wherein a heat accumulating member provided to be capable of contacting with and separating from an outer peripheral surface of the pressure member and a pressure contact/separation mechanism are further included, and the hardware processor performs control to idle the heating rotator for a predetermined time in a state where the heat accumulating member is brought into pressure contact with the pressure member to accumulate heat in the heat accumulating member.