To facilitate and carry out with high precision the positioning of a separating claw for a fixing roll and a pressure roll.

In this image forming device, a member 23 retaining the separating claw 21 is made able to be rotated to a frame body 11 of the fixing device with a certain supporting point as the center. Positioning of the separating claw 21 and the roll 12 is carried out by having a colliding part 26 provided on this retainer member 23 abutted to a bearing 14 supporting a fixing roll or a pressure roll.