Patent ID: 8068765

Claim:
A fixing device, comprising: a fixing section including a fixing roller; a planar heat-generating body which is curved; and a fixing belt which is endless and is wound around an outer surface of the fixing roller and an outer surface of the planar heat-generating body; and a pressure section, provided so as to face the fixing roller in the fixing section via the fixing belt, for pressing the fixing roller, the planar heat-generating body being arranged so that at least both ends of the planar heat-generating body are in contact with the outer surface of the fixing roller, said both ends being in a circumferential direction when viewed in an axial direction of the fixing roller, the planar heat-generating body having, in the vicinity of said both ends, shapes formed gently with respect to the outer surface of the fixing roller when it is viewed in the axial direction, and a combination of (i) that part of an inner surface area of the fixing belt which is in contact with the planar heat-generating body and (ii) that part of the inner surface area of the fixing belt which is in contact with the fixing roller being at least 90% of the inner surface area.