A composite piezoelectric material capable of reducing a peak temperature of a vibrator array to be used for transmitting or receiving ultrasonic waves in ultrasonic imaging. The composite piezoelectric material includes: plural piezoelectric materials arranged along a flat surface or curved surface； and an anisotropic heat conducting material having a higher coefficient of thermal conductivity in at least one direction and provided between the plural piezoelectric materials and/or at outer peripheries of the plural piezoelectric materials.
