POWER TRANSMISSION SYSTEM

To provide a power transmission system capable of suppressing occurrence of noise and reducing noise leakage. A power transmission system of the present invention transmits electric energy to a secondary resonator having a secondary resonator coil 260 through an electromagnetic field of a predetermined frequency generated from a primary resonator having a primary resonator coil 160 and reduces noise using two noise cancellation resonators with one of the predetermined frequency and its higher harmonic component set as a noise reduction target frequency. The power transmission system includes, as the two noise cancellation resonators, a first noise cancellation resonator 300 that includes a first noise cancellation resonator coil 310 and has a resonance frequency higher than the noise reduction target frequency by a first shift frequency determined according to a coupling degree between the primary resonator coil 160 and the first noise cancellation resonator coil 310 and a second noise cancellation resonator 340 that includes a second noise cancellation resonator coil 350 and has a resonance frequency lower than the noise reduction target frequency by a second shift frequency determined according to a coupling degree between the primary resonator coil 160 and the second noise cancellation resonator coil 350.