To reduce current leakage, lower temperature, to achieve effect enhancing voltage resistance, and greatly enhance lighting efficiency by providing a piezoelectric serial resonance lighting circuit.

The piezoelectric serial resonant lighting circuit uses capacity characteristics present in a piezoelectric transformer as piezoelectric capacity, a piezoelectric lighting circuit is composed by connecting in series the piezoelectric transformer arranged in series on a lamp bulb and an independent inductance, and when the piezoelectric serial resonant lighting circuit is applied to driving of a multi-lamp bulb, fixed frequency is utilized, an inner impedance value in an equivalent circuit of the piezoelectric capacity is fixed, current flowing through each lamp bulb is made to agree, and the current equilibrium action of the multi-lamp bulb is produced.