The present invention relates to a wireless communication system. Particularly, the present invention relates to a method for transmitting control information and an apparatus therefor, the method comprising the steps of: generating a PUCCH for transmitting the control information; and transmitting the PUCCH from a subframe having a plurality of symbols, wherein the PUCCH is transmitted from an Mth symbol (M>N) of the subframe when a downlink control channel is transmitted to first N (N>0) number of symbols of the subframe, and the PUCCH is transmitted from a first symbol of the subframe when the downlink control channel is not transmitted to the subframe.