| 摘要 |
An oxygen sensor has an elongate plate form oxygen sensor element provided at a tip portion thereof with an oxygen detection portion which produces an electromotive force between electrodes or shows a variation in electrical resistance, according to the concentration of oxygen in a gas under measurement. The oxygen sensor element is composed of conductor portions each formed along the thickness direction of the oxygen sensor element so as to lead out a conductor lead provided in the oxygen sensor element to a surface of the oxygen sensor element. The oxygen sensor further has electrode terminal portions each provided on a surface of the oxygen sensor element so as to make conduction to the conductor lead through the conductor portion; contacts electrically connected to the electrode terminal portions of the oxygen sensor element; and a metallic container member containing the oxygen sensor element therein, wherein at least one of the conductor portions is located on the rear end side of contact point portions between the electrode terminal portions and the contacts.
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