An electrical connector includes an insulating housing (1) defining a mating face and a cylindrical receiving space (13) running though the mating face. A plurality of terminals is retained in the insulating housing and each includes contacting portions projecting to the receiving space and solder portions extending downwardly out of the housing. A retaining device (6) is individually formed and has a second portion (63) located at a rear portion of the housing for receiving the solder portions of the terminals and a first portion (61) located under a bottom wall of the housing. An indicating device (5) is received in the first portion (61) and facing the mating face.