PURPOSE: To obtain the plane antenna whose structure is rigid without causing a defective continuity, with ease of assembling and having matching pin structure manufactured inexpensively.

CONSTITUTION: A tip of a metallic pipe 120 having a flange 122 is soldered to a patch 103, the flange is in press contact with a lower face of a ground plate 101 to act itself like a short-pin 104. A coaxial cable 130 is inserted from an opening of the flange in the metallic pipe and the metallic pipe and a shield outer sheath 134 of the coaxial cable are bonded by soldering at a hole 124 formed in the metallic pipe. The metallic band 136 retaining the shield outer sheath of the coaxial cable and the flange 122 are tightened together to a ground plate 101 by a screw 138 and tightened simultaneously. High reliability is obtained by the metallic pipe and no expensive connector is required.