To prevent disadvantages due to intrusion of oil in an electrode lead structure of a sensor used in oil or an atmosphere where oil is scattered.

A terminal molding component 31 is mold formed to a base part 21 when molding a resin molding component 13 with mold resin, the base part 21 is provided with a first through-hole 51 and a second through-hole 52, and part of a terminal 23 is exposed. Thus, a first mold region 61 covered by the mold resin forming the resin molding component 13, a first non-mold region 62 not covered by the mold resin, a second mold region 63 covered by the mold resin, a second non-mold region 64 not covered by the mold resin, and a third mold region 65 covered by the mold resin are formed in order from the base end side provided with a harness connection part 41 toward the front end side.