The present invention discloses a method for a terminal to transmit control information in a wireless communication system. The method includes encoding a plurality of pieces of control information and transmitting the plurality of encoded control information and data information through a data channel. During the encoding of the plurality of control information, a channel quality indicator (CQI) and a precoding matrix index (PMI) for an entire frequency band are encoded jointly or separately, and each piece of the plurality of pieces of encoded control information and the data information is mapped into a resource block of the data channel, and is then transmitted.