portion 2 a and a terminal portion soldering portion 2 b the lower shell 4 comprises a main body 4 a and a pair of lock springs 4 b integrally formed on opposite ends of the main body 4 a the insulator 3 is made of a resin material and has a fitting portion 3 a and a main body portion 3 b the fitting portion 3 a is provided with a plurality of contact grooves 3 c a plurality of contact holes 3 d extend from the contact grooves 3 c towards the main body portion 3 b respectively each contact hole 3 d has an exit opened on the side of the main body portion 3 b and faced to a mount portion or a platform 3 e serving as a wiring portion the fitting portion 3 a has a pair of guide posts 3 f integrally formed on left and right front ends thereof to guide fitting of the cable connector 1 and a mating connector which will later be described each guide post 3 f has a lock groove 3 g formed on its outer side surface the main body portion 3 b has a pair of insertion holes 3 h formed on left and right rear ends thereof to receive the lock springs 4 b to be inserted therein respectively the insulator 3 is provided with a plate.