An electrical connector includes an insulating body having a first insulator and a second insulator, and multiple terminals disposed on the insulating body. A gap space is formed between the first and second insulators. The gap space is filled with air. Each terminal has a mating segment located above the first insulator, a first fixing segment extending downward from the mating segment and insert-molded into the first insulator, a connecting segment extending downward from the first fixing segment and exposed to the gap space, a second fixing segment extending downward from the connecting segment and insert-molded into the second insulator, and a positioning segment extending downward from the second fixing segment and located below the second insulator. The width of the first and second fixing segment is less than the width of at least one of the mating segment, the connecting segment and the positioning segment.