A fixing device has a first roller, a second roller, a peeling member located on a sheet exit side relative to the paired rollers to be guided in a direction away from the first roller, and a positioning mechanism configured to position the peeling member. The positioning mechanism has a support shaft located on the sheet exit side relative to the first roller in a state parallel to the axis of the first roller, a positioning member carrying the peeling member, supported by the support shaft to rotate toward and away from a roller shaft, and configured to abut a peripheral surface of the roller shaft, and an elastic member configured to urge the positioning member in a direction to abut on the peripheral surface portion of the roller shaft.