An electronic component testing apparatus for testing a device under test (DUT) includes: a socket unit that is electrically connected to the DUT; a first wiring board that includes a board opening; and a tester that includes a test head in which the first wiring board is mounted. The socket unit includes a first socket that faces a first main surface of the DUT and is electrically connected to the DUT and the first wiring board. The second socket that is exposed from the first wiring board through the board opening, contacts a second main surface of the DUT on a side opposite to the first main surface, and includes: a base that contacts the second main surface; and a test antenna unit that is electrically connected to the tester and faces a device antenna unit of the DUT.