An electrical receptacle connector includes an insulated housing, flexible terminals, and flat terminals. The insulated housing includes a base portion and a tongue portion. The flexible terminals and the flat terminals are held in the base portion and disposed at an upper surface of the tongue portion. The flat terminals are arranged in front of the flexible terminals and include two pairs of signal terminals and a ground terminal between the signal terminals. Each flat terminal includes a flat contact portion, a tail portion, and a body portion between the flat contact portion and the tail portion. The body portion of the ground terminal includes two first widening portions extended outward from two sides thereof. A first distance is defined between each first widening portion and the body portion of the corresponding nearest signal terminal. A second distance is defined between the two signal terminals for each pair thereof.