The present invention is designed to improve the efficiency of the use of radio resources in retransmission control in future radio communication systems. A user terminal according to one aspect of the present invention has a receiving section that receives a downlink (DL) signal, and a control section that, when a transport block of the DL signal is divided into a plurality of code blocks, controls transmission of retransmission control information representing an acknowledgment (ACK) or a negative acknowledgment (NACK) for each code block, or representing an ACK or a NACK for each code block group, which groups fewer code blocks than the plurality of code blocks.