The present invention is designed so that communication can be carried out adequately even when a plurality of CCs with different TTI durations are used. A user terminal can communicate with a radio base station by using a plurality of CCs (Component Carriers) having different transmission time interval (TTI) durations, and has a transmitting section that transmits UL signals to predetermined CCs, and a control section that controls transmission of the UL signals, and the control section controls the transmission of the UL signals for each CC group formed with at least one CC, and CCs that form each CC group are configured based on TTI durations.