The two lower ground terminals 32 are integrally molded to the lower dielectric body 16. The lower row of the conductive terminals 20 are located between the two lower ground terminals 32. Rear ends and middles of the lower fixing portions 321 and front ends of the lower soldering portions 323 of the two lower ground terminals 32 are molded in the lower dielectric body 16. Front ends of the lower fixing portions 321 and the lower touching portions 322 of the two lower ground terminals 32 are fastened in the two lower lacking grooves 163. Rear ends of the lower soldering portions 323 of the two lower ground terminals 32 project beyond the rear surface of the lower base portion 161. The lower touching portions 322 of the two lower ground terminals 32 project beyond the bottom surface of the lower connecting portion 162.