A heating device comprising: an endless heating belt; a pressing member configured to press an outer surface of the heating belt; a nip formation pad disposed inside a loop of the heating belt and configured to contact the pressing member via the heating belt to form a nip; a heater disposed inside the loop of the heating belt and configured to heat the heating belt; a reflector disposed inside the loop of the heating belt and configured to reflect heat from the heater, the reflector having an opening disposed opposite a first portion of the heating belt other than a second portion of the heating belt facing the nip formation pad in a circumferential direction of the heating belt, the opening of the reflector disposed at a position, in a width direction of the heating belt, corresponding to an end of a recording medium having a largest width in recording media that the heating device handles; and a support disposed inside the loop of the heating belt and configured to support the nip formation pad, the support having an opening disposed opposite the first portion of the heating belt, the opening of the support disposed at a position, in the width direction of the heating belt, corresponding to the end of the recording medium having the largest width in the recording media that the heating device handles; characterised by another reflector different from the reflector, wherein said another reflector has a reflection face that faces the opening of the support and the opening of the reflector, wherein the reflection face is configured to reflect heat, radiated from the heater to the side opposite the openings (33c, 34c), towards the openings (33c, 34c). an endless heating belt; a pressing member configured to press an outer surface of the heating belt; a nip formation pad disposed inside a loop of the heating belt and configured to contact the pressing member via the heating belt to form a nip; a heater disposed inside the loop of the heating belt and configured to heat the heating belt; a reflector disposed inside the loop of the heating belt and configured to reflect heat from the heater, the reflector having an opening disposed opposite a first portion of the heating belt other than a second portion of the heating belt facing the nip formation pad in a circumferential direction of the heating belt, the opening of the reflector disposed at a position, in a width direction of the heating belt, corresponding to an end of a recording medium having a largest width in recording media that the heating device handles; and a support disposed inside the loop of the heating belt and configured to support the nip formation pad, the support having an opening disposed opposite the first portion of the heating belt, the opening of the support disposed at a position, in the width direction of the heating belt, corresponding to the end of the recording medium having the largest width in the recording media that the heating device handles; characterised by another reflector different from the reflector, wherein said another reflector has a reflection face that faces the opening of the support and the opening of the reflector, wherein the reflection face is configured to reflect heat, radiated from the heater to the side opposite the openings (33c, 34c), towards the openings (33c, 34c).