We evaluate the effectiveness of a stream of hot air from a hair dryer for killing eggs and adults of human body lice, Pediculus humanus corporis. All adult lice treated with hot air at 50℃ for 5min did not survive, although all adult lice treated with cool air at 27-28℃ for 5min survived normally. In the exposure of hot air at 55℃ for 1min or more all adults died. The stream of hot air at 60℃ also killed all adults even when exposure was brief (for 30sec). Louse eggs treated with hot air at 55℃ for more than 90 sec never hatched. The escape behaviour of adult lice treated with hot air at 50℃ was observed and the average speed travelled by a female adult was 6.9mm/sec and by a male adult 7.3mm/sec.