The portable radio communication apparatus

A portable wireless communication device, wherein a case antenna (20) is composed of a first conductor section (7), a grounding conductor section (9) and a first power feed section (2). The first conductor section (7) is a ground plane of an upper case of a double-foldable cellular phone. The grounding conductor section (9) is a ground plane of a lower case of the double-foldable cellular phone. A1/4 wavelength patch antenna (30) short-circuited at one end is composed of the first conductor section (7), a second conductor section (8), a short-circuit conductor section (10), and a second powerfeed section (3). The first power feed section (2) is a power feed section for the case antenna (20). The second power feed section (3) is a power feed section for the patch antenna (30). The first and the second power feed sections (2, 3) are connected to a wireless communication circuit (4) and makes wireless communication possible.