An array antenna includes: a first radiation body of which one end is connected to a first power supply line; a second radiation body of which one end is connected through a second power supply line connected to the other end of the first radiation body; a third radiation body of which one end is connected through a third power supply line connected to the other end of the second radiation body; and a fourth radiation body of which one end is connected through a fourth power supply line connected to the other end of the third radiation body, wherein the first and second radiation bodies are formed to be symmetrical with the third and fourth radiation bodies on the basis of the third power supply line.