Patent ID: 7506534

Claim:
A gas sensor comprising: an element holder including a distal-end-side holding surface and a proximal-end-side holding surface located on the proximal end side with respect to the distal-end-side holding surface; a tubular metallic shell including a stepped portion projecting radially inward from its inner circumferential surface, and adapted to hold the element holder therein while surrounding the element holder from radially outside and supporting the distal-end-side holding surface of the element holder by a support surface of the stepped portion; and a first metallic packing abutting the proximal-end-side holding surface of the element holder and the inner circumferential surface of the metallic shell, wherein the first packing is disposed in an acute-angle clearance formed between the proximal-end-side holding surface of the element holder and the inner circumferential surface of the metallic shell such that the first packing has a wedge-like cross section and is pressed against the proximal-end-side holding surface of the element holder and the inner circumferential surface of the metallic shell, and a gas detection element extending along the axial direction, wherein the element holder has an opening through which the gas detection element is passed extending from the proximal-end-side holding surface to the distal-end-side holding surface of the element holder.