Patent ID: 8764955

Claim:
A gas sensor comprising: a gas sensor element extending in a direction of an axis and having a detection portion provided at a front end thereof for detecting a particular gas component in a gas to be measured; a housing made of metal, the housing radially surrounding the gas sensor element, and adapted for inserting at least partially into a sensor-mounting hole of a mounting body; and a protector fitted to a front-end engagement portion of the housing for protecting the detection portion, the gas sensor further comprising: a resin member which radially surrounds the housing at least partially and having a contact portion in contact with the housing that is at least partially disposed axially frontward with respect to an outer surface of the mounting body around the sensor-mounting hole, wherein the resin member comprises an insert-molded resin member body fixed to the housing in a gastight configuration, and a heat sink member that is in contact with the housing at an axial position that is located frontward of an axial position of a front end of the contact portion, and adapted to radiate heat of the housing to the outside of the gas sensor.