PURPOSE: To provide satisfactory characteristics as a circularly polarized wave array antenna and to reduce a loss on a feeder line.

CONSTITUTION: A feeder line 10 for distribution is provided in parallel to the antenna element arranging direction of first and second array antennas 11 and 12 consisting of plural antenna elements 13 and 14 respectively parallelly arranged, and individual feeder lines 15 and 16 are connected between this transmission line 10 for distribution and the antenna elements 13 and 14. Then, power is respectively distributed from the feeder line 10 for distribution through two distributors to the individual feeder lines and second individual feeder lines 15 and 16. Next, desired power feeding phase difference is provided between the antenna elements 13 and 14 corresponding to a line length between the connecting position of the individual feeder line 15 and the connecting position of the individual feeder line 16 on the feeder line 10 for distribution.