An electrical generator using piezoelectric element (PZT) is proposed in order to convent diffused vibrations energy. This paper describes the electrical generation characteristics of PZT added dopant (Nb, Fe, Ta, W) the effect of load velocity on static load test. Static load tests are performed using an experimental equipment composed of PZT, oil cylinder and load cell. Static load tests are carried out under the condition of compressive load acting on PZT. Effects of stress velocity, concentration of dopant and kind of dopant on generated voltage and electric power are evaluated.