During a field survey in 5 and 6 April, 2015, a gull of the family Laridae was observed in Maizhokunggar, Tibet Autonomous Region. This gull was identified as juvenile of Larus hyperboreus which is a new record of birds in Tibet Autonomous Region. Environment of specimen were described in this paper. The finding of this species in Tibet will benefit us in further study on geographical distribution of L. hyperboreus.