The present invention miniaturizes a HEMT element used as a switching element in a radio frequency module. A single gate electrode 17 is formed in an active region defined by an element separation portion 9 on a main surface of a substrate 1 comprising GaAs. The gate electrode 17 is patterned so as to extend in the vertical direction of the page surface between source electrodes 13 and drain electrodes 14, and to extend in left and right directions at other portions. Thus, the ratio of the gate electrode 17 disposed outside the active region is reduced, and the area of a gate pad 17A is reduced.