A radar system includes: control circuitry that generates a beam control signal; a first radar device including a first transmission antenna and first beam formation circuitry that causes the first transmission antenna to perform a first scan including a second scan from left to right by changing an emission angle and a third scan from right to left by changing an emission angle in such a manner that a part of the second scan and a part of the third scan are performed alternately one after another; and a second radar device including a second transmission antenna and second beam formation circuitry that cause the second transmission antenna to perform a fourth scan in such a manner that a phase of the fourth scan is opposite to a phase of the first scan.