An electrical connector includes an insulating body, a number of first conductive terminals, a number of second conductive terminals, an adapter circuit board, and cables. The first conductive terminals include a number of first high-speed signal terminals and a number of first non-high-speed signal terminals. Each first high-speed signal terminal includes a first connecting portion. Each first non-high-speed signal terminal includes a first elastic mounting arm. The second conductive terminals include a number of second high-speed signal terminals and a number of second non-high-speed signal terminals. Each second high-speed signal terminal includes a second connecting portion. Each second non-high-speed signal terminal includes a second elastic mounting arm. The adapter circuit board is located between the first elastic mounting arms and the second elastic mounting arms. The cables include first cables electrically connected to the first connecting portions and second cables electrically connected to the second connecting portions.