A heating device for an image forming unit, the heating device comprising: a roller centered on a first center axis; a heater unit; a cylindrical film at least partially disposed around the heater unit, the cylindrical film centered on a second center axis, the second center axis parallel to the first center axis; and a support member configured to support the heater unit above the cylindrical film and such that the heater unit is located between the support member and the cylindrical film, wherein the heater unit is centered on a third center axis, the third center axis being parallel to a line that intersects the first center axis and the second center axis, and the third center axis being offset from the line such that a sheet fed between the roller and the cylindrical film intersects the line before intersecting the third center axis, characterized in that the heating device comprises: a first heat transfer unit disposed between the cylindrical film and the heater unit and in confronting relation with a first surface of the heater unit; and a second heat transfer unit disposed between the heater unit and the support member and in confronting relation with a second surface of the heater unit, the second surface opposite the first surface, wherein the first heat transfer unit is integrally formed with the second heat transfer unit in a heat absorbing member; and the heat absorbing member has a U-shape that partially extends around the heater unit. a roller centered on a first center axis; a heater unit; a cylindrical film at least partially disposed around the heater unit, the cylindrical film centered on a second center axis, the second center axis parallel to the first center axis; and a support member configured to support the heater unit above the cylindrical film and such that the heater unit is located between the support member and the cylindrical film, wherein the heater unit is centered on a third center axis, the third center axis being parallel to a line that intersects the first center axis and the second center axis, and the third center axis being offset from the line such that a sheet fed between the roller and the cylindrical film intersects the line before intersecting the third center axis, characterized in that the heating device comprises: a first heat transfer unit disposed between the cylindrical film and the heater unit and in confronting relation with a first surface of the heater unit; and a second heat transfer unit disposed between the heater unit and the support member and in confronting relation with a second surface of the heater unit, the second surface opposite the first surface, wherein the first heat transfer unit is integrally formed with the second heat transfer unit in a heat absorbing member; and the heat absorbing member has a U-shape that partially extends around the heater unit. a first heat transfer unit disposed between the cylindrical film and the heater unit and in confronting relation with a first surface of the heater unit; and a second heat transfer unit disposed between the heater unit and the support member and in confronting relation with a second surface of the heater unit, the second surface opposite the first surface, wherein the first heat transfer unit is integrally formed with the second heat transfer unit in a heat absorbing member; and the heat absorbing member has a U-shape that partially extends around the heater unit.