An image forming apparatus including a fixing unit that fixes a toner image on a recording material includes an acquisition unit configured to acquire grammage information about the recording material, and a temperature control unit configured to control a temperature of a heating rotary member of the fixing unit based on the grammage information. The temperature control unit changes the temperature control of the heating rotary member depending on the acquired grammage information about a predetermined number of recording materials within a predetermined time.

A transport device includes: a pair of registration rollers that transport a recording medium to a transfer part at a predetermined timing; a pair of transport rollers that are provided upstream of the pair of registration rollers in a recording-medium transport direction and transport the recording medium toward the pair of registration rollers that are not rotated; a first guide part that is provided downstream of the pair of transport rollers in the recording-medium transport direction and guides the recording medium to the pair of registration rollers; a second guide part that is provided downstream of the pair of registration rollers in the recording-medium transport direction and guides the recording medium to the transfer part; a position changing mechanism that changes positions of the first guide part and the second guide part according to a type of the recording medium; and a pressure changing mechanism that changes a contact pressure between the pair of transport rollers in conjunction with the first guide part that has been moved by the position changing mechanism.