Patent ID: 7637145

Claim:
A gas sensor comprising: a sensing element that detects a concentration of a specific gas component contained in a gas to be measured, the sensing element being elongated to have a longitudinal direction; a heater that heats up the sensing element for detection of the concentration; an element-holding body that allows the sensing element to be inserted and to be held therein; an atmosphere-side insulator formed to have an inner wall surface and disposed to allow the inner wall surface to overlap with a base end part of either the sensing element or the heater in the longitudinal direction; a plurality of electrodes disposed on either the sensing element or the heater; plurality of contact fittings disposed between the inner wall surface of the atmosphere-side insulator and the base end part of either the sensing element or the heater so as to contact the electrodes for electric conduction to the electrodes, respectively, wherein each of the contact fittings comprises a base plate located to contact the inner wall surface of the atmosphere-side insulator and an electrode contact member located to each of the electrodes; and suppressing means for suppressing the contact fittings from shifting relative to the electrodes in directions crossing the longitudinal direction, the suppressing means being a plurality of elastic members secured to each of the contact fittings and located to press the inner wall surface of the atmosphere-side insulator.