A fixing apparatus comprising: a fixing side member (61,63) located to face a fixing side of a sheet on which a toner image is formed; a back side member configured to form a fixing nip portion which holds and conveys the sheet when the back side member is urged against the fixing side member (61, 63); a drive motor configured to rotate the back side member; a fixing nip width adjustment unit configured to adjust the fixing nip width (d) of the fixing nip portion; characterised by a braking force generation motor configured to generate a braking force in the direction to hinder rotation of the fixing side member (61,63); a rotational speed detection unit configured to detect the rotational speed of the braking force generation motor; and a control unit configured to perform restore control for recovering the fixing side member (61,63) from a rough surface to remove a gloss line by driving the drive motor for rotating the fixing side member (61,63) and the back side member with a desired differential circumferential speed therebetween while the braking force is exerted on the fixing side member (61,63) by the braking force generation motor, wherein the control unit is configured to perform speed keeping control for keeping the rotational speed of the braking force generation motor detected by the rotational speed detection unit no higher than a predetermined speed during performing the restore control, wherein the control unit is configured to perform the restore control and the speed keeping control in a non-fixing period in which the fixing nip width adjustment unit is controlled to decrease the fixing nip width (d) smaller than in a fixing period. a fixing side member (61,63) located to face a fixing side of a sheet on which a toner image is formed; a back side member configured to form a fixing nip portion which holds and conveys the sheet when the back side member is urged against the fixing side member (61, 63); a drive motor configured to rotate the back side member; a fixing nip width adjustment unit configured to adjust the fixing nip width (d) of the fixing nip portion; characterised by a braking force generation motor configured to generate a braking force in the direction to hinder rotation of the fixing side member (61,63); a rotational speed detection unit configured to detect the rotational speed of the braking force generation motor; and a control unit configured to perform restore control for recovering the fixing side member (61,63) from a rough surface to remove a gloss line by driving the drive motor for rotating the fixing side member (61,63) and the back side member with a desired differential circumferential speed therebetween while the braking force is exerted on the fixing side member (61,63) by the braking force generation motor, wherein the control unit is configured to perform speed keeping control for keeping the rotational speed of the braking force generation motor detected by the rotational speed detection unit no higher than a predetermined speed during performing the restore control, wherein the control unit is configured to perform the restore control and the speed keeping control in a non-fixing period in which the fixing nip width adjustment unit is controlled to decrease the fixing nip width (d) smaller than in a fixing period.