To research the cause of the low and the poor visibility phenomena of Kimhae international airport statistically, we analyzed the field routine data for the last five years from 1985 to 1989. The poor visibilities below l㎞, 3㎞, and 5㎞ usually occurred at about 6 o`clock in the morning under the condition of calm or light wind from south to southwest direction, and lasted for from 1 to 3 hours. They were caused by the radiative cooling and the inflow of moisture from the South Sea. The frequency of the low visibility(below 9㎞) recorded 48.1% a year. And the low visibility below 8㎞ with relative humidity below 70% often occurred in the case of southeast, southwest, and northwest wind. And it reveals a peak at 11:00 a.m.. It is supposed to be caused by the pollutants flowing from the neighbouring industrial complex, Sasang, Jangnim and by the photochemical reaction. And, when the industrial complex is built in Sinho, Myongji, Noksan located southwest, and Changyu area located northwest direction from Kimhae international airport, the visibility and the air pollution may become worse and worse by the increased pollutants.