An electrical connector (1, 1') includes a housing (11, 11') having a front end (A, A') and a rear end (B, B'), an insulator (12, 12') including a tongue portion (121, 121') disposed at the front end (A, A') and a base (122, 122') disposed at the rear end (B, B'), and plural terminals including plural ground terminals (13, 13a', 13b'), plural power terminals (14, 14a', 14b') and plural signal terminals (15, 15'). Each of the plural terminals has a first contact portion (131, 141, 151, 131a', 131b', 141a', 141b', 151'), a second contact portion (132, 142, 152, 132a', 132b', 142a', 142b', 152') and a connection portion (133, 143, 153, 133a', 133b', 143a', 143b', 153') connecting the first contact portion (131, 141, 151, 131a', 131b', 141a', 141b', 151') with the second contact portion (132, 142, 152, 132a', 132b', 142a', 142b', 152'). The first contact portions (131, 141, 151, 131a', 131b', 141a', 141b', 151') are disposed on surfaces of the tongue portion (121, 121') in a widthwise direction perpendicular to a direction from the front end (A, A') to the rear end (B, B'), and the second contact portions (132, 142, 152, 132a', 132b', 142a', 142b', 152') are extended out from the base (122, 122'). Widths in the widthwise direction of the second contact portions (132, 142, 132a', 132b', 142a', 142b') of the plural ground terminals (13, 13a', 13b') and the plural power terminals (14, 14a', 14b') are larger than a width of the first contact portion (131, 141, 131a', 131b', 141a', 141b') respectively thereof.