An electrical connector socket includes an outer frame, an insulating base, first socket terminals, and second socket terminals. The outer frame includes a first and second insert space which respectively meets a first and second standard. The insulating base has a tongue including a first and second tongue portion. The thickness of the first tongue portion is different from that of the second tongue portion. One end of the first socket terminals is embedded in the base, and the other end is disposed at the first tongue portion and faces the first insert space. One end of the second socket terminals is embedded in the base, the other end of part of second socket terminals is disposed at the second tongue portion and faces the first insert space, and the other end of the other part is disposed at the second tongue portion and faces the second insert space.