A semiconductor device includes first and second gate structures extending in a first direction and spaced apart from each other in a second direction intersecting the first direction, a third gate structure extending in the first direction and provided between the first and second gate structures, a first contact connected to the first gate structure and having a first width in the second direction, a second contact connected to the second gate structure and having a second width in the second direction, and a third contact connected to the third gate structure and having a third width in the second direction. The first, second, and third contacts may be aligned with each other in the second direction to constitute one row. The first and second widths may be greater than the third width.