A semiconductor device including: a semiconductor chip including a substrate, an outer-connection electrode, and a bump, wherein the bump has a first conductive layer and a second conductive layer provided on the first conductive layer, and the second conductive layer is made of copper; a wiring board having a land; and an insulating material dispersed with conductive particles, wherein the conductive particles connect between the bump and the land, wherein an electrical connection is established by the conductive particles having penetrated to both the second conductive layer and the land.