Specifically, the upper row of the conductive terminals 20 are integrally molded to the upper dielectric body 15 and arranged transversely. The fastening portions 21 of the upper row of the conductive terminals 20 are integrally molded in the upper dielectric body 15. The extending portions 22 and the contact portions 23 of the upper row of the conductive terminals 20 project beyond the front surface of the upper connecting portion 152. The soldering feet 25 of the upper row of the conductive terminals 20 project beyond a rear surface of the upper base portion 151. The lower row of the conductive terminals 20 are integrally molded to the lower dielectric body 16 and arranged transversely. The fastening portions 21 of the lower row of the conductive terminals 20 are integrally molded in the lower dielectric body 16. The extending portions 22 and the contact portions 23 of the lower row of the conductive terminals 20 project beyond the front surface of the lower connecting portion 162. The soldering feet 25 of the lower row of the conductive terminals 20 project beyond a rear surface of the lower base portion 161.