Abstract: An inhalant medicator includes a medicator body 1 which is formed therein with a cylindrical fit hole 2, an inhalant port 3, an inflow air passageway 5, and an outflow air passageway 6, and a medical powder storage cylindrical member 8 which is installed or fitted into the cylindrical fit hole 2 in a manner so as to open or close the air passageways 5 and 6 with respect to a medical powder storage chamber 12. The inhalant medicator is constructed by two component parts, namely the medicator body 1 and the medical powder storage cylindrical member 8, thus ensuring simplified structure and reduced production costs. Additionally, powder-and-granular medicine or medical powder 16 is tightly encapsulated within the medical powder storage chamber 12 by means of the medical powder storage cylindrical member 8, thus preventing loss of flow of the medical powder 16.