In a RF microwave connecter for telecommunication, a upper end surface of a central terminal is provided with a sheet type connection portion; whereby, when an inner conducting wire of a coaxial cable is placed on the upper sides of said upper end surface and said connection portion of said central terminal, said connection portion and said sheet are then further allowed to bend to cause said inner conducting wire to be thrust into said fixing groove and a lower end of said insulating sheet to be positioned in said groove to compress the upper side of said inner conducting wire to enable the central terminal and the inner conducting wire to be coupled stably. Furthermore, the central terminal of the connecter is allowed to manufacture more easily.