The antenna device and array antenna apparatus

A first cavity portion 1 made of a metal conductor having an opening bottom is closed, the first being positioned to overlap the upper surface of the cavity part 1, the first feed probe 13 therein, and the first feed probe 13 has a first transmission line 14 for supplying power to, the first exciting circuit 10 that radiates radio waves of the first polarization, which are disposed so as to overlap the upper surface of the first exciting circuit 10, a through hole and a second cavity portion 30 and the third cavity portion 50 made of a metal conductor, over the first exciting circuit 10, with a matching element 45 made of a conductor.