An electrical connector includes a first pair of differential signal terminals, a second pair of differential signal terminals, a first grounding terminal, a second ground terminal and a three grounding terminal. A first signal terminal and a second signal terminal of the first pair of differential signal terminals as well as a third signal terminal and a fourth signal terminal of the second pair of differential signal terminals are arranged in a first direction in order. Connecting pins of the first pair of differential signal terminals and the second pair of differential signal terminals are staggerly arranged in a second direction which is transverse to the first direction. The first grounding terminal is arranged next to the first signal terminal, and at least one connecting pin of the first grounding terminal is adjacent to a connecting pin of the first signal terminal. The second grounding terminal is arranged between the second signal terminal and the third signal terminal and comprises two connecting pins, wherein one connecting pin of the second grounding terminal is adjacent to a connecting pin of the third signal terminal, and the other connecting pin of the second grounding terminal is adjacent to a connecting pin of the second signal terminal. The third grounding terminal is arranged next to the fourth signal terminal, at least one connecting pin of the third grounding terminal is adjacent to a connecting pin of the fourth signal terminal. The electrical connector of the utility model can reduce electromagnetic radiation.