Provided is a carbonated spring generating device capable of efficiently generating a carbonated spring without increasing the water pressure. The carbonated spring generating device has an air-bubble dissolving path (12) through which water having carbon dioxide bubbles mixed therein flows the air-bubble dissolving path (12) has at least one constricted section (14) that divides the carbon dioxide bubbles, and a pressure holding section (16) that maintains the water pressure in the output side end of the air-bubble dissolving path (12), at the water pressure of inside the air-bubble dissolving path (12) the effective diameter of the air-bubble dissolving path (12) is stipulated such that the viscous resistance (R) of the air bubbles at the flow speed of the water flowing through the air-bubble dissolving path (12) is at least the buoyancy (F) of the carbon dioxide bubbles when the carbon dioxide bubbles have a maximum diameter (D) as the effective diameter thereof and the constricted section (14) has a smaller effective diameter than the air-bubble dissolving path (12).Linvention concerne un dispositif de génération deau gazeuse permettant la génération efficace deau gazeuse sans augmenter la pression deau. Le dispositif de génération deau gazeuse comporte un chemin de dissolution des bulles dair (12) à travers lequel coule de leau comportant des bulles de dioxyde de carbone mélangées le chemin de dissolution des bulles dair (12) possède au moins une section resserrée (14) qui divise les bulles de dioxyde de carbone, et une section de maintien de pression (16) qui maintient la pression de leau dans lextrémité côté sortie du chemin de dissolution des bulles dair (12), à la pression deau de lintérieur du chemin de dissolution des bulles dair (12) le diamètre effectif du chemin de dissolution des bulles dair (12) est stipulé de telle sorte que la résistance visqueuse (R) des bulles dair à la vitesse découlement de leau sécoulant à travers le chemin de dissolution de
