Wireless power transmission system

A wireless power transmission system comprising:

• a power transmission device including:
• a first wireless power transmission portion,
• a second wireless power transmission portion,
• a first outer side,
• a second outer side opposite to the first outer side,
• a third outer side, and
• a fourth outer side opposite to the third outer side,
• the first wireless power transmission portion being disposed on the third outer side between a midpoint of the third outer side and an endpoint of the third outer side that connects to the first outer side,
• the second wireless power transmission portion being disposed on the fourth outer side between a midpoint of the fourth outer side and an endpoint of the fourth outer side that connects to the second outer side;
• and
• a power receiving object including a power receiving portion configured to receive electric power wirelessly transmitted from the first or the second wireless power transmission portion, wherein
• one of the first and the second wireless power transmission portions transmits the electric power to the power receiving portion, and the other of the first and the second wireless power transmission portions does not transmit the electric power to the power receiving portion, and
• wherein the first and the second wireless power transmission portions each include a coil, the third outer side does not include coils between the midpoint and an endpoint connecting to the second outer side, and the fourth outer side does not include coils between the midpoint and an endpoint connecting to the first outer side.