Each of a first connector and a second connector of a connector assembly includes at least two high frequency signal terminals. When viewed from a first direction, each periphery of the high frequency signal terminals is surrounded by an outer shell and an inner shell. The outer shell has a substantially quadrilateral shape. The high frequency signal terminals, the outer shells surrounding peripheries of the high frequency signal terminals, and the inner shells, which are disposed on a second symmetry axis form a linearly symmetrical shape with the second symmetry axis as a center line of the outer shells along a second direction orthogonal to the first direction in which the high frequency signal terminals are arranged.