Array antenna apparatus

To provide an antenna device of high radiation efficiency, which has a wide-angle radiation pattern and which does not give rise to a null in the vicinity of the front surface of the antenna. [Solution] An array antenna device (1) having a plurality of radiating elements, wherein the device has: a dielectric substrate (2); two or more series array antennas formed on the dielectric substrate, and including a plurality of radiating elements (11-13, 21-23) connected in series by conductor lines (15, 25); a distributor (30) formed in a different layer from the layer in which the series array antennas (10, 20) are formed on the dielectric substrate, for distributing power to the two or more series array antennas through capacitive coupling; and phase shifters (conducting lines (34-37)) for shifting the phase of the power distributed by the distributor.