This wireless power transmission system includes: a power transmitting antenna and a power receiving antenna arranged to face each other and not to be in contact with each other; and an electromagnetic shield structure that includes a first shield and a second shield to house, in its inner space, the power transmitting and power receiving antennas facing each other. The first and second shields are configured to make first and second spaces to house the power transmitting and power receiving antennas, respectively. At least one of the first and second shields includes a protruding portion that is parallel to at least one of the power transmitting and power receiving antennas and that protrudes out of the shield sidewalls. Power is transmitted by a non-contact method through a radio frequency magnetic field from the power transmitting antenna to the power receiving antenna.