To provide a radio wave object simulator where there is no error between an object echo radiation position obtained by calculation and an actual radio wave incoming direction when viewed from a test piece.

The radio wave object simulator is provided with a plurality of antennas 3, a control section 6 that supplies a high frequency signal to one or two or more antennas among a plurality of the antennas in response to a control signal. The control signal indicates a radiation object position when one or two or more antennas receiving the high frequency signal emit a radio wave corresponding to the high frequency signal and each of a plurality of the antennas is mounted on an antenna mount face 2. A three dimensional radio wave absorbing body 11 is provided between each of the antennas of a plurality of the antennas in a direction of the mount of each of a plurality of the antennas from the antenna mount face.