PURPOSE: To omit the breaking mechanism of an ampule and a bag and to enhance the safety and reliability of a sprayer by receiving a gas generating substance having an m.p. equal to or lower than room temp. in a container main body and generating the melting thereof after the preparation of the sprayer.

CONSTITUTION: A substance melting within a low temp. region equal to or lower than room temp. is used as one or more component of two or more substances constituting the gas generating substance 1 is received or provided in a container main body 2. Further, the temp. of the gas generating substance 1 is lowered so that the substance melting within a low temp. region is melted after a sprayer is prepared. By this method, the gas generating substance 1 is not melted even when it obtains heat energy from the open air through the container main body 2 until the preparation of the sprayer is completed and, when the sprayer is placed at room temp. or placed inside and outside a factory after the preparation is completed, the gas generating substance 1 obtains heat energy from the open air to generate chemical reaction to become a state possible to generate gas.