To eliminate residual heat of hair by hot wind to keep a hair style for a long time by equipping a cold wind route dedicated to cold wind in between a suction port and a heater of a hair dryer and constructing the hair dryer so that sucked air is separated before reaching the heater into a hot wind route and a cold wind route which are simultaneously blown out.

Air is sucked through a suction port 1 and separated before reaching a heater 4 into a cold wind route 7 and a hot wind route 6 through which air is blown out separate. The air passed through the cold route can reach a blow-out port 8 without affected by the heater 4 and be blown out. The air sent to the hot wind route 6 is heated by the heater 4 and blown out through a blow-out port 5. Both blowing-outs of hot wind and cold wind are simultaneously blown out and are quickly switched for alternate blow-out. This hair dryer is used for hair styling to curl hair by hot wind and instantly cool the hair by the cold wind to fix.