To improve transmission efficiency by selecting data for scheduling according to data type, and to achieve low power consumption and high-speed signal processing.

A control section 108 allocates a transmission data sequence 1 to subcarriers of superior quality by carrying out scheduling for the transmission data sequence 1 on the basis of CQI sent from a communication terminal apparatus and required transmission rate information for each communication terminal apparatus, and allocates a transmission data sequence 2 to preassigned subcarriers. A channel allocation section 115 allocates data for the transmission data sequence 1 to subcarriers designated by the control section 108. A channel allocation section 116 allocates data for the transmission data sequence 2 to subcarriers designated by the control section 108.