A semiconductor device includes a substrate having an active region, first standard cells arranged in a first row on the active region, second standard cells arranged in a second row on the active region and having a first boundary with the first standard cells, a third standard cells arranged in a third row on the active region and having a second boundary with the first standard cells, and a plurality of power supply lines, respectively arranged along boundaries. Each of the first to third standard cells includes a plurality of fin patterns extending in the first direction, and the plurality of fin patterns are arranged in a second direction, so as not to be disposed on at least one boundary, among the first and second boundaries.