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This paper presents a computational and experimental study of a valveless pump driven by a noble piezoelectric composite actuator consisting of a bimorph piezoelectric plate and a metal cap. The superiority of deformation performance of the proposed composite actuator was demonstrated computationally through fi nite element simulation and was then verifi ed experimentally by defl ection measurements of a disc-shaped prototype under an alternating electric fi eld. The proposed composite actuator was applied to a valveless pump in a Y-shaped fl uid channel. The pump's performance was estimated using a piezoelectric-fl uid interaction fi nite element simulation. The effect of the fl uid channel confi guration was investigated, and the liquid feed volume is discussed and compared with that of conventional actuators.