PROBLEM TO BE SOLVED: To provide a soda water-generating device which efficiently dissolves carbon dioxide in water, the device concerned conducting gas dissolution in a short-length mixing flow channel and being simple in structure.SOLUTION: Partition plates 23, which are formed by forming concave-convex parts 23a on the surface of a flat plate, are separately, opposite arranged, and the peripheries of the partition plates 23 are hermetically sealed to form a gas-liquid mixing area 7. A fluid inlet 21 and a fluid outlet 22, which are away from each other, are formed in the gas-liquid mixing area 7 to form a gas-dissolving container 2. Water and carbon dioxide (CO2) are fed, individually or together, into the gas-dissolving container 2 through an inflow pipe 3 connected to the inlet 21. The soda water generated in the gas-dissolving container 2 is supplied, as soda water, to the outside through an outflow pipe 4 connected to the fluid outlet 22. In addition, the gas-dissolving container 2 has a lamination structure in which many gas-liquid mixing areas 7 overlap each other.COPYRIGHT: (C)2013,JPO&INPIT【課題】気体溶解を短い混合流路長で、かつ簡略な構造で炭酸ガスを効率的に水に溶解させる炭酸水生成装置を提供する。【解決手段】平板面上に凹凸部23aを形成した区画板23と、該区画板23を離隔対面配置すると共に該区画板23の周囲を気密に封止して気液混合域7を形成する。該気液混合域7には、流体の流入口21と流出口22とを離隔した位置に形成して気体溶解器2を形成する。この気体溶解器2に、水と炭酸ガス(CO2)とを別個に又は合流させて流入口21に連結した流入管3を介して供給する。前記気体溶解器2で生成した炭酸水は流出口22に連結した流出管4を介して炭酸水として外部に供給することを特徴としている。さらに、上記気体溶解器2は上記気液混合域7を多数個重ね合せた積層構造としている。【選択図】図3