Abstract: A portable radio communication apparatus of the present invention comprises a main body having an operation section, a microphone, a speaker, an antenna portion, wherein the speaker is built in the main body, the antenna portion has a top end portion projected to the outside of said main body, the top end portion has a helical antenna, and the microphone is provided in an air-core of the helical antenna. At a telephone conversation, the speaker provided in the main body is set to an ear, and the microphone built in the antenna top end portion is put close to a mouth.