This connector assembly comprises a header 1 to which a plurality of coaxial cables 3 are connectable and a socket 2 configured to be mounted on a printed board 4. The header 1 can be detachable coupled to the socket 2. The header 1 has a first terminal array 12 to which the coaxial cables 3 are electrically connectable. The socket 2 has a second terminal array 21 which makes contact with the first terminal array 12 when the header 1 is coupled to the socket 2. The first terminal array has a plurality of first terminals each having a wire terminal 120 for connection with each conductive wire of the cables and a contact 122 for contact with the second terminal array. The feature of the present invention resides in that the wire terminals 120 are arranged in a line, and the contacts 122 of the first terminal array are arranged in two rows in a staggered configuration, and a pitch of the contacts 122 of each row is larger than a pitch of the wire terminals 120.