POWER RELAY

To provide a power transmission apparatus having a simpler configuration and capable of transmitting power from a magnetic field resonance type power transmitter to an electromagnetic induction type electronic device. [0002] A disclosed power transmission apparatus includes a cover part (101, 201) attached to one of a power transmitter (10) and an electronic apparatus (500), the power transmitter (10) including a primary-side coil (1) connected to an alternating-current power supply (6) and a primary-side resonant coil (2) configured to receive power from the primary-side coil (1) by electromagnetic induction, the electronic apparatus (500) including a secondary-side coil (4); and a secondary-side resonant coil (3) disposed in the cover part (101, 201), and configured to transmit to the secondary-side coil (4) the power received from the primary-side resonant coil (2) by magnetic field resonance generated between the primary-side resonant coil (2) and the secondary-side resonant coil (3).