Patent ID: 8737896

Claim:
A fixing device configured to heat a recording material bearing a toner image at a nip portion while conveying the recording material thereby to fix the toner image onto the recording material, the fixing device comprising: a tubular film; a nip portion forming member contacting an inner surface of the film; a pressure member forming the nip portion together with the nip portion forming member via the film; and a regulating member configured to regulate a movement of the film by contacting an end surface of the film in a generatrix direction of the film when the film moves in the generatrix direction, wherein the regulating member includes an inclined regulating surface opposed to an area which is one including the nip portion of two areas of the end surface halved by an imaginary plane parallel to the nip portion, the inclined regulating surface inclined such that a distance from an imaginary plane including the end surface is gradually decreased as the regulating surface extends away from the nip portion in a circumferential direction of the film and that the distance therefrom is gradually increased as the regulating surface extends in a radial direction of the film.