A local average absorbed power measuring method for measuring, with an electric and/or magnetic probe, electric field strength or magnetic field strength of radio waves emitted from a radio device to a phantom, which simulates dielectric properties of a human body, the electric and/or magnetic probe being disposed in the phantom, the radio device having a plurality of antennas (310 k) that emit radio waves of an identical frequency, the local average absorbed power measuring method comprising: an individual measurement step (S515, S510) of measuring amplitude and phase of the electric field or magnetic field of each one of the plurality of antennas at measurement points (511 mn) disposed two-dimensionally in a plane at a given distance from a surface of the phantom or at measurement points (511 lmn) disposed three-dimensionally in the phantom; and a calculation step comprising: a combination sub-step (S525, S520) of applying predetermined weights to the amplitudes and phases of the electric fields or magnetic fields of the individual antennas obtained in the individual measurement step and combining the results; and a local average absorbed power candidate calculation sub-step (S535, S530) of calculating a distribution of absorbed power in three-dimensional space on the other side of the antennas, as viewed from the two-dimensional plane in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that the measurement points (511 mn) are disposed two-dimensionally in a plane in the individual measurement step and of calculating a distribution of absorbed power in three-dimensional space in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that measurement points are disposed three-dimensionally in the individual measurement step, and obtaining a local average absorbed power in the absorbed power distribution, which corresponds to the weights, as a local average absorbed power candidate; and repeating the combination sub-step and the local average absorbed power candidate calculation sub-step while varying the predetermined weights to obtain a plurality of local average absorbed power candidates. an individual measurement step (S515, S510) of measuring amplitude and phase of the electric field or magnetic field of each one of the plurality of antennas at measurement points (511 mn) disposed two-dimensionally in a plane at a given distance from a surface of the phantom or at measurement points (511 lmn) disposed three-dimensionally in the phantom; and a calculation step comprising: a combination sub-step (S525, S520) of applying predetermined weights to the amplitudes and phases of the electric fields or magnetic fields of the individual antennas obtained in the individual measurement step and combining the results; and a local average absorbed power candidate calculation sub-step (S535, S530) of calculating a distribution of absorbed power in three-dimensional space on the other side of the antennas, as viewed from the two-dimensional plane in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that the measurement points (511 mn) are disposed two-dimensionally in a plane in the individual measurement step and of calculating a distribution of absorbed power in three-dimensional space in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that measurement points are disposed three-dimensionally in the individual measurement step, and obtaining a local average absorbed power in the absorbed power distribution, which corresponds to the weights, as a local average absorbed power candidate; and repeating the combination sub-step and the local average absorbed power candidate calculation sub-step while varying the predetermined weights to obtain a plurality of local average absorbed power candidates. a combination sub-step (S525, S520) of applying predetermined weights to the amplitudes and phases of the electric fields or magnetic fields of the individual antennas obtained in the individual measurement step and combining the results; and a local average absorbed power candidate calculation sub-step (S535, S530) of calculating a distribution of absorbed power in three-dimensional space on the other side of the antennas, as viewed from the two-dimensional plane in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that the measurement points (511 mn) are disposed two-dimensionally in a plane in the individual measurement step and of calculating a distribution of absorbed power in three-dimensional space in the phantom from the combined amplitudes and phases of the electric field or magnetic field obtained in the combination sub-step in case that measurement points are disposed three-dimensionally in the individual measurement step, and obtaining a local average absorbed power in the absorbed power distribution, which corresponds to the weights, as a local average absorbed power candidate; and repeating the combination sub-step and the local average absorbed power candidate calculation sub-step while varying the predetermined weights to obtain a plurality of local average absorbed power candidates.