A new type of plunging jet absorber using a liquid jet containing small solute bubbles, which is formed through a nozzle having a gas sucking type bubble generator, was devised. The absorber consists of liquid jet and gas bubble dispersed phase. In this study, first, the effects of various conditions in the gas sucking type bubble generator on gas holdup h(GD), specific gas-liquid interfacial area a(D) and gas-liquid interfacial area A(D) in the gas bubble dispersed phase were studied experimentally. Secondly, the mechanism of liquid phase mass transfer in the gas bubble dispersed phase was considered theoretically using a two-region model. Thirdly, the performance of this plunging jet absorber was evaluated. Consequently, it was found that the theoretical values of the product of liquid phase mass transfer coefficient with gas-liquid interfacial area (k(L)A)(T) in the gas bubble dispersed phase involving the liquid jet were in good agreement with observed values. The performance of this absorber was comparable to that of other gas-liquid contacting devices.