A disclosed radio communications apparatus performs at least an automatic repeat request control and performs radio communications using a frame that occupies predetermined plural frequency bands. This apparatus includes a reception portion that receives feedback information about each of a plurality of frequency bands from a communications party, a determination portion that determines which frequency band among the plural frequency bands is to be used to retransmit a retransmission packet indicated by the feedback information, and a transmission portion that transmits the retransmission packet using. one or more determined frequency bands.