This study was conducted to investigate the seasonal occurrence of Phyllocnistis citrella Stainton (Citrus leafminer; CLM) and parasitoids in Jeju region, where the damage of CLM to the citrus farm has been recently increased. For this study, annual CLM mornitoring using sex pheromone traps were conducted in the citrus farm of Jeju from 2011 to 2015. The mean annual occurrence of CLS was 477,389 and appeared to increase along the temperature.