Method for transmitting uplink control information in wireless communication system and apparatus for same

Disclosed in the present application is a method for a user equipment transmitting uplink control information to a base station in a wireless communication system. Particularly, the method for transmitting uplink control information comprises the steps of: transmitting, to the base station, first uplink control information having a specific payload size and including acknowledgement (ACK)/negative ACK (NACK) information for downlink data; and periodically transmitting, to the base station, second uplink control information having the specific payload size and including channel state information, wherein when the time of transmission of the first uplink control information conflicts with the time of the second uplink control information, the determination on whether to drop the channel state information is made according to the priority of the channel state information.