An array antenna device includes a plurality of radiating elements, a plurality of radiating elements and a plurality of feeder paths. The plurality of radiating elements are disposed in a plurality of regions defined by excluding at least one region of at least one of the four corners of a polygon defined by overall 2N×2N regions, from the 2N×2N regions provided in a two-dimensional matrix arrangement, where N is an arbitrary natural number of 2 or greater. The plurality of feeder paths feed the plurality of radiating elements.