PIEZOELECTRIC TRANSFORMER

PROBLEM TO BE SOLVED: To provide a piezoelectric transformer capable of stably acquiring insulation performance by properly securing a creepage distance between a primary electrode and a secondary electrode.SOLUTION: Notches 11A and 11B are respectively formed at the ends of the primary electrodes 1A and 1B, and notches 21A and 21B are respectively formed at the ends of the secondary electrodes 2A and 2B. With respect to distances in the longitudinal direction of a substrate between the primary electrodes 1A and 1B and the secondary electrodes 2A and 2B, each distance L2 at the ends of a substrate 3 is longer than each distance L1 at the center of the substrate 3.