A heating apparatus includes a cylindrical film and a pressing element that rotates with the cylindrical film and forms a nip with the cylindrical film. A medium is conveyed through the nip from an upstream side to a downstream side. The heating apparatus further includes a guide member arranged inside the cylindrical film and including a first end portion that contacts the cylindrical film at a location that is downstream of an upstream end of the nip, and a substrate arranged inside the cylindrical film and on which a heating element is disposed. An upstream end of the substrate is located downstream of the first end portion of the guide member.