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 , towards the openings . 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 , towards the openings . <EOS>