The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal, comprising: multiplexing control information and multiple pieces of data information; and transmitting the multiplexed control information and multiple pieces of data information through a physical uplink shared channel. The number Q′ of modulation symbols for transmitting the multiplexed control information is determined by a specific mathematical expression, and selection offset â is a value which is set by a preset condition from among the offset values corresponding to the respective data information.