Power transmission device

A power transmission device which wirelessly transmits power to a power receiving device, the power transmission device comprising:

• a power transmission circuit that generates an electric signal;
• a first power transmission coil that transmits the power by a first transmission method using the electric signal generated by the power transmission circuit;
• a second power transmission coil that transmits the power by a second transmission method using the electric signal generated by the power transmission circuit;
• a first power transmission coil position moving unit that moves a position of the first power transmission coil in a direction perpendicular to a coil surface;
• and
• a control unit that controls the first power transmission coil position moving unit to move the first power transmission coil in a direction away from the power receiving device, in a case where the power transmission circuit generates the electric signal so as to transmit the power from the second power transmission coil.