In order to understand chemical characteristics and dewfall formation in western Busan area, we analysed monthly distribution of dewfall, and investigated the correlation between dewfall formation amount and meteorological factors. This study used the modified teflon plate (1m×1m) at Silla university in Busan from August 2002 to April 2003. In order to estimate qualitatively water soluble components, IC, ICP and UV methods for water soluble ions are also used respectively. Dewfall amount of sampling periods (47 day) collected 3.8 ㎜. Meteorological conditions for the formation of dewfall above 50 g/m2 showed that temperature diurnal range(℃) was 5.6℃ above, cloud amounts (1/10) at dawn of the sampling day was 7/10 below, mean wind speed at dawn (0～6hr) of the sampling day was 4.4 m/sec below, and mixing ratio at 6hr of the sampling day was 3.2 g/kg above. Distribution of water soluble ions in dewfall founded the highest concentration (206.1 μeq/ℓ for SO42-, 42.4 μeq/ℓ for NH4+, 249.2 μeq/ℓ for Ca2+, and 42.0 μeq/ℓ for Mg2+) during the March, the lowest concentration (73.0 μeq/ℓ for SO42-, 4.6 μeq/ℓ for NH4+ and 72.7μeq/ℓ for Ca2+) during the August. Monthly equivalent ratio of [SO42-]/[NO3-] showed the highest value (4.99) during the October, the lowest value (1.84) during the August, and the mean value was 3.45.