An intermediate connection electrical connector includes a plurality of blades and a supporting member for supporting the blades arranged in an arrangement direction. The supporting member includes a surrounding wall portion for surrounding the blades and a regulating portion for positioning the blades. The surrounding wall portion includes a side wall portion and an edge wall portion. The side wall portion is at least partially formed of an electromagnetic wave absorbing material. The regulating portion is disposed inside the surrounding wall portion to define a blade accommodating space for accommodating the blades.