A wireless power transmission apparatus comprises: a power transmission antenna (22-1, 22-2, 22-N) adapted to transmit, to each of a plurality of wireless power reception apparatuses (3-1, 3-2, 3-N), each of a plurality of high-frequency power corresponding to a first frequency and each of a plurality of high-frequency power corresponding to a second frequency; characterized by a plurality of receiver circuits (23-1, 23-2, 23-N) adapted to obtain, from each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N): i) a required voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N), ii) a first power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the first frequency, and iii) a second power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the second frequency; and a control circuit adapted to sum first errors to obtain a first sum total, wherein each of the first errors occur between i) the required voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N) and ii) the first power reception voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N), wherein the control circuit is further adapted to sum second errors to obtain a second sum total, wherein each of the second errors occur between i) the required voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N) and ii) the second power reception voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N), wherein the control circuit is further adapted to transmit, to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N), each of a plurality of high-frequency power corresponding to a third frequency, wherein in case the second sum total is smaller than the first sum total, the third frequency is obtained by adding a predetermined step size of the frequency to the second frequency; and wherein in case the second sum total is larger than the first sum total, the third frequency is determined to be closer to the first frequency than to the second frequency. a power transmission antenna (22-1, 22-2, 22-N) adapted to transmit, to each of a plurality of wireless power reception apparatuses (3-1, 3-2, 3-N), each of a plurality of high-frequency power corresponding to a first frequency and each of a plurality of high-frequency power corresponding to a second frequency; characterized by a plurality of receiver circuits (23-1, 23-2, 23-N) adapted to obtain, from each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N): i) a required voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N), ii) a first power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the first frequency, and iii) a second power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the second frequency; and i) a required voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N), ii) a first power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the first frequency, and iii) a second power reception voltage value that corresponds to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N) and that corresponds to the second frequency; and a control circuit adapted to sum first errors to obtain a first sum total, wherein each of the first errors occur between i) the required voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N) and ii) the first power reception voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N), wherein the control circuit is further adapted to sum second errors to obtain a second sum total, wherein each of the second errors occur between i) the required voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N) and ii) the second power reception voltage value that corresponds to each of the plurality of the receiver circuits (23-1, 23-2, 23-N), wherein the control circuit is further adapted to transmit, to each of the plurality of the wireless power reception apparatuses (3-1, 3-2, 3-N), each of a plurality of high-frequency power corresponding to a third frequency, wherein in case the second sum total is smaller than the first sum total, the third frequency is obtained by adding a predetermined step size of the frequency to the second frequency; and wherein in case the second sum total is larger than the first sum total, the third frequency is determined to be closer to the first frequency than to the second frequency. wherein in case the second sum total is smaller than the first sum total, the third frequency is obtained by adding a predetermined step size of the frequency to the second frequency; and wherein in case the second sum total is larger than the first sum total, the third frequency is determined to be closer to the first frequency than to the second frequency.