According to one embodiment, a semiconductor device includes an interconnect provided on a first interlayer insulating film covering a semiconductor substrate in which an element is formed, a cap layer provided on the upper surface of the interconnect, and a barrier film provided between the interconnect and a second interlayer insulating film covering the interconnect. The interconnect includes a high-melting-point conductive layer, and the width of the interconnect is smaller than the width of the cap layer. The barrier film includes a compound of a contained element in the high-melting-point conductive layer.