Method for driving laminated piezoelectric device

A method for driving a laminated piezoelectric device (1, 2A-2D) is provided. The device (1, 2A-2D) includes a piezoelectric stack (10) and a pair of side electrodes (151). The piezoelectric stack (10) includes a plurality of piezoelectric layers (11) and a plurality of inner electrode layers (121, 122) laminated alternately. Each piezoelectric layer (11) is made of piezoelectric material having a rate of temperature dependence of piezoelectric modulus defined as RA, a rate of temperature dependence of capacitance defined as RC, and a constant value defined as K. The piezoelectric material has a relationship expressed as RA=K(RC)1/2. The method includes the step of energizing the inner electrode layers (121, 122) to keep energy of the laminated piezoelectric device (1, 2A-2D) constant.