The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides an apparatus and method for efficiently transmitting a packet in a wireless communication system. The present disclosure provides an operation method for a transmitter in a wireless communication system, the operation method comprising the steps of: mapping a parameter according to quality of service (QoS) information or a service type; determining, on the basis of the parameter, whether to duplicate a packet; when it is determined that the packet is to be duplicated, duplicating the packet; and transmitting the duplicated packets to a receiver.