A fixing device for fixing a toner image on a recording material, includes a rotatable endless belt member, a pressure member provided to press into contact and form a nip portion with the belt member, through which the recording material passes, and a peeling member provided downstream of the nip portion, peeling the recording material passed through the nip portion from the belt member by bending the belt member to have different shapes at a widthwise middle portion and at both end portions while the belt member is passing through the peeling member.