During the period of June 15, 1978 to February 28, 1979 fungi were isolated from 101 public and home telephones in 6 different cities and classified. Total 203 isolates were obtained and classified into 8 genera and 6 species, however 44 of the isolates were unidentified. Penicillium spp. were frequently found. Forty isolates were derivated from coffee shops, 51 from street public telephones, 35 from stores, 26 from offices and 19 from homes. Also 27 were from Seoul, 30 from Daegu, 46 from Gunsan, 82 from Chunju and 18 from Jaeju. Twenty-seven were isolated in summer and 174 in winter. From the above observations, it is concluded that the transimitters are heavily colonized with various species of fungi and some of them are pathogens. The rates of colonization appeared to be various by locations and seasons.