Descriptions on the method and the apparatus for controlling uplink transmission power are provided. The method for controlling uplink transmission power comprises receiving a signal on a downlink channel in dual connectivity with master eNB (MeNB) and secondary eNB (SeNB), allocating transmission power for sounding reference signals (SRS) and transmitting SRS to the MeNB and SeNB based on the allocated transmission power. Transmission power may be allocated differently depending on whether the MeNB and the SeNB are synchronous or not.