The present invention relates to a method and a device for transmitting a queuing delay measurement report in a wireless communication system, the method comprising: receiving a queuing delay measurement configuration including discard timer values and a measurement period from an eNB, wherein each of the discard timer values respectively corresponds to one radio bearer among a set of radio bearers associated with a QCI configured for the UE, determining a queuing delay for the QCI based on queuing delays for PDCP SDUs from the set of radio bearers during the measurement period, selecting a specific discard timer value among the discard timer values, calculating a queuing delay ratio for the QCI by dividing the queuing delay for the QCI by the specific discard timer value, and transmitting a queuing delay measurement report including the QCI and the queuing delay ratio for the QCI to the eNB.