To provide a hair dryer which can simultaneously blow hot air and cold air and effectively prevent hair and skin from excessive over heating.

The hair dryer 1 includes a dryer body 2 and a blower nozzle 3, and a fan F blows air. The dryer body 2 is configured to split the air flow into a hot air flow passage 4 for blowing hot air and a cold air flow passage 5 for blowing cold air by setting a heater H at a middle position between the fan F and an exit 8 by setting a boundary wall 6. Matching the structure of such the dryer body 2, the blower nozzle 3 splits the air flow into a hot air flaw passage 10 for blowing hot air and a cold air flow passage 11 for blowing cold air by the boundary wall 12.