To allow a liquid medicine effective for treating the hair and the scalp to be properly and easily used in an appropriate amount.

A fan 3 sucks air as shown by arrows (a) and (a') and discharges it as shown by an arrow (b). A constricted part 15a is formed in the middle of a flow path, wherein a nozzle 16 is positioned in the constricted part 15a. The liquid medicine 8 in the cartridge 7 is sucked up and sprayed by spraying operation of the constricted part and the nozzle. A plurality of cartridges 7 are prepared and the respective cartridges enclose different kinds of liquid medicines. An arbitrary cartridge is selected and inserted into a cartridge storage hole 2d as shown by an arrow (c), for mounting.