A device housing package, comprising: a substrate having a device mounting region in an upper face thereof; a frame body having a through hole formed in part thereof, the frame body being disposed on the substrate so as to lie along a periphery of the device mounting region; and an input-output terminal disposed in the through hole, the input-output terminal having a first dielectric layer extending interiorly and exteriorly of the frame body; a signal line formed on the first dielectric layer and configured to provide electrical connection between an interior of the frame body and an exterior thereof; a first ground layer formed on a lower face of the first dielectric layer; a second dielectric layer formed on the signal line so as to overlap the frame body as viewed in a transparent plan view; a second ground layer formed on an upper face of the second dielectric layer; and a pair of metal layers disposed within the second dielectric layer so as to extend from the interior of the frame body to the exterior thereof along the signal line, wherein the pair of metal layers are formed to extend from the second dielectric layer to the first dielectric layer, connecting with the first ground layer and the second ground layer, being separated from the signal line, wherein the pair of metal layers are so formed as to extend from an inner wall of the second dielectric layer exposed inside the frame body to an outer wall of the second dielectric layer exposed outside the frame body, and wherein the signal line is formed between the pair of metal layers, as viewed in a transparent plan view. a substrate having a device mounting region in an upper face thereof; a frame body having a through hole formed in part thereof, the frame body being disposed on the substrate so as to lie along a periphery of the device mounting region; and an input-output terminal disposed in the through hole, the input-output terminal having a first dielectric layer extending interiorly and exteriorly of the frame body; a signal line formed on the first dielectric layer and configured to provide electrical connection between an interior of the frame body and an exterior thereof; a first ground layer formed on a lower face of the first dielectric layer; a second dielectric layer formed on the signal line so as to overlap the frame body as viewed in a transparent plan view; a second ground layer formed on an upper face of the second dielectric layer; and a pair of metal layers disposed within the second dielectric layer so as to extend from the interior of the frame body to the exterior thereof along the signal line, a first dielectric layer extending interiorly and exteriorly of the frame body; a signal line formed on the first dielectric layer and configured to provide electrical connection between an interior of the frame body and an exterior thereof; a first ground layer formed on a lower face of the first dielectric layer; a second dielectric layer formed on the signal line so as to overlap the frame body as viewed in a transparent plan view; a second ground layer formed on an upper face of the second dielectric layer; and a pair of metal layers disposed within the second dielectric layer so as to extend from the interior of the frame body to the exterior thereof along the signal line, wherein the pair of metal layers are formed to extend from the second dielectric layer to the first dielectric layer, connecting with the first ground layer and the second ground layer, being separated from the signal line, wherein the pair of metal layers are so formed as to extend from an inner wall of the second dielectric layer exposed inside the frame body to an outer wall of the second dielectric layer exposed outside the frame body, and wherein the signal line is formed between the pair of metal layers, as viewed in a transparent plan view.