An image forming apparatus includes: a transport unit that transports an object along a transport path; a transfer unit that transfers an image onto the object on the transport path; and a fixing unit that has a heat source for increasing a temperature inside the fixing unit, into which the object onto which the image has been transferred is carried along the transport path, and includes a first opening and closing member that opens a carry-in opening when the object is carried into the fixing unit and closes the carry-in opening after the object is carried into the fixing unit.