Hairdryer

A hairdryer comprising:

• a cylindrical body housing comprising a gas discharge portion at a front surface thereof;
• a heater module positioned in the body housing and configured to provide heat;
• and
• a handle housing connected to a lower portion of the body housing,
• wherein the heater module comprises:
• a first heater case having a cylindrical shape;
• a second heater case disposed around an outer periphery of the first heater case in a state of being spaced apart from the outer periphery of the first heater case;
• a main passage defined between the first heater case and the second heater case;
• a heating wire positioned at the main passage;
• a front board positioned in the first heater case;
• and
• a subsidiary passage extending through an inside of the first heater case.