A mobile station for communication using carrier aggregation includes a secondary cell state management unit configured to manage whether a state of a secondary cell is an activation state or a deactivation state; and a transmission control unit configured to stop transmission of uplink control information on a physical uplink control channel in a first secondary cell, when the state of the first secondary cell managed by the secondary cell state management unit is the deactivation state at a timing of transmission of the physical uplink control channel in the first secondary cell.