PROBLEM TO BE SOLVED: To provide a simpler and inexpensive production method of mixed gas, and a mixed gas production apparatus therefor； and to provide a mixed gas supply system using the mixed gas production apparatus.SOLUTION: In the state where liquid A1 is brought into contact with one surface 10a between the double surfaces of a gas permselective membrane 10, first gas B1 is brought into contact with the liquid A1. Hereby, mixed gas C1 containing second gas A2 formed by evaporating the liquid A1 and the first gas B1 is obtained from the other surface 10b of the gas permselective membrane 10.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】混合ガスのより単純かつ安価な製造方法、そのための混合ガス製造装置、および、該混合ガス製造装置を用いた混合ガス供給システムを提供すること。【解決手段】ガス選択透過膜１０の両面のうちの一方の面１０ａに，液体Ａ１を接触させた状態で、該液体Ａ１に第１のガスＢ１を接触させる。それにより、ガス選択透過膜１０の他方の面１０ｂから、液体Ａ１が気化した第２のガスＡ２と第１のガスＢ１とを含む混合ガスＣ１を得る。【選択図】図１
