Heating device including heat pipe

A heating device comprising:

• a heating unit comprising a contact portion having a first surface, configured to heat a member to be heated having a second surface, which is transported, as a result of the contact portion of the heating unit being in contact with the member to be heated;
• a heat pipe that is configured to have a first end and a second end opposite to the first end in a widthwise direction, and contact with a portion of the heating unit different from the contact portion in such a manner as to extend in the widthwise direction crossing a transport direction of the member to be heated, wherein the heat pipe includes a crimped portion only disposed at a first end side of the heat pipe;
• a rotating body comprising a third surface, configured to rotate in such a manner as to press the member to be heated;
• a power input unit, comprising a gear, that is only disposed on a second end side of the heat pipe and that configured to input a rotational force at least to the rotating body;
• and
• a power-supply connection unit that is disposed on the first end side of the heat pipe and that is connected to a wiring line through which power is supplied to the heating unit,
• wherein the crimped portion is located on the first end side opposite to the second end side on which the gear is disposed,
• wherein the first end of the heat pipe has a thickness smaller than that of the second end.