In precision machinery systems for electronic devices, due to the generation of heat, cooling system is essentially needed. Miniaturized pumps have been demanded for cooling water circulation and a low power consumption. To obtain sufficient performance for practical applications, in this paper, a piezoelectric pump composed of hinge-lever using multilayer PZT actuator to generate large displacement and two sheet type check valves to control flow direction are designed. First, hinge-lever mechanism consists of a pin hinge-lever and two multilayer PZT actuators. The metal bellows is used as a flexible pump chamber. The hinge-lever mechanism produces a 560 mum displacement with free load. Second, a check valve with high response is applied and the basic characteristics are experimentally investigated with various shapes and thickness. As a result, the maximum flow rate of 1.85 l/min and maximum pumping pressure of 25 kPa are obtained with the driving frequency of 11 Hz at 100 Vp-p