There is provided a radio communication apparatus that performs communication in a plurality of different radio communication systems independently of one another and is capable of normally performing data communication with interference in the data communication avoided. The radio communication apparatus includes modems respectively corresponding to DECT communication and GSM communication respectively utilizing close frequency bands for transmitting/receiving data, and is configured so that communication time slots not used for time division multiplex domestic radio communication or for time division multiplex subscriber channel radio communication may be adjusted between the modems by a modern controller 208 for avoiding simultaneous communication timing.