The present invention provides a gas introduction holding device, a gas introduction holding method, and a gas discharge head used in the gas introduction holding device capable of increasing the dissolved amount of gas in a liquid. A liquid storage tank 10 for storing liquid, a gas discharge head 20 having a large number of micropores having a hole diameter of 2.5 μm or less, a gas supply means 30 for supplying gas to the gas discharge head 20, and a gas discharge And a vibration applying means 40 having a vibrator 41 for applying vibration to the head 20 so as to discharge gas from the gas discharge head 20 while continuously applying vibration to the gas discharge head 20 immersed in the liquid. It has become. The vibration applied to the gas discharge head 20 by the vibrator 41 is set such that the frequency is 30 kHz or more and the amplitude is 1 mm or less. ) / (Vibration frequency Hz of the vibrator 41) ≦ 300, the gas supply amount to the gas discharge head 20 is adjusted. [Selection] Figure 1
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