Clinical study was performed on 128 cases who complained of hoarsseness in according to causes therapies. which causes were newly known and advanced treatment methods were developed. The following results were obtained : 1) Among 128 cases, male was 45.3%, and female 54.7%, so sex ratio was 1:1.2. 2) The highest incidence of age causing hoarseness in order of frequency were 4th decade 30.5%, 5th decade 26.6% and 6th decade 24.8%. 3)The underlying diseases causing hoarsensess in oder of frequency were functional dysphonia 26.5%, laryngeal nodule 17.7% and chroic laryngitis 16.3%. 4) In view of the occupation. sterss group was 84.1% and non-stress group 15.9%. 5) The highest incidence of associated diseases in order of frequency were gastro intestinal diseases 29.7%, hypertension 9.4% and pulmonary tuberculosis 2.3%. 6) Vocal hygiene and voice therapy are the most needful therapeutic modalities.