A method and a communication apparatus for transmitting uplink control information in a wireless communication system; and a method and a communication apparatus for receiving uplink control information in a wireless communication system are discussed. The method according to an embodiment includes identifying a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK)(0), HARQ-ACK(1) and HARQ-ACK(2); and transmitting bits b(0)b(1) using a Physical Uplink Control Channel (PUCCH) resource based on the HARQ-ACK (0), the HARQ-ACK(1) and the HARQ-ACK(2), according to a relation including Table 1. The HARQ-ACK(0) and the HARQ-ACK(1) indicate Acknowledgement (ACK)/Negative ACK (ACK/NACK)/Discontinuous Transmission (DTX) responses to data blocks related to a first cell, the HARQ-ACK(2) indicates ACK/NACK/DTX response to a data block related to a second cell, n(1)PUCCH,0 indicates a PUCCH resource linked to a Physical Downlink Control Channel (PDCCH) on the first cell, and n(1)PUCCH,2 indicates a PUCCH resource linked to a PDCCH on the second cell.