A method for transmitting uplink (UL) data requiring low latency in a wireless communication system is disclosed. The method performed by a user equipment (UE) includes receiving a first control message for informing a basic Contention-based PUSCH (Physical Uplink Shared Channel) Zone (CP zone) allocated to each subframe from an enhanced Node B (eNB), receiving a second control message for informing changes in a CP zone allocated to a specific subframe from the eNB, and transmitting UL data to the eNB through a CPRB (Contention PUSCH Resource Block) of the changed CP zone based on the received second control message. The first control message includes basic CP zone resource information indicating resource information of the basic CP zone, and the second control message includes changed CP zone resource information indicating resource information of the changed CP zone.