A semiconductor device package includes a substrate, a package body, a via and an interconnect. The substrate includes a surface and a pad on the first surface. The package body covers at least a portion of the surface of the substrate. The via is disposed in the package body and includes a conductive layer and a first intermediate layer. The conductive layer is electrically connected with the pad. The first intermediate layer is adjacent to the conductive layer. The interconnect is disposed on the first intermediate layer.