A mobile station apparatus efficiently switches coding schemes when coding both information indicating an ACK/NACK and first control information. A mobile station apparatus 200 determines a number of bits of information on a HARQ based on a number of downlink subframes corresponding to the information on a HARQ transmitted in a certain uplink subframe, a number of set serving cells, and a transmission mode set in each serving cell, applies spatial bundling to the information on a HARQ in a case where the determined number of bits of the information on a HARQ exceeds a predetermined value, and selects one of a first coding scheme and a second coding scheme based on the number of bits of the information on a HARQ to which spatial bundling has been applied and a number of bits of a scheduling request and codes both the information on a HARQ and the scheduling request.
