Power supply plugs, which couple a power supply active region to a power supply metal interconnect, include a plurality of first plugs, which are arranged at first pitches of a predetermined length, and a second plug, which is spaced apart from the closest one of the first plugs by a center-to-center distance different from an integral multiple of the predetermined length. Among the power supply plugs, the second plug is closest to a third plug, which is an interconnect plug closest to the power supply active region and the power supply metal interconnect.