Speech is one of forms of social behavior and means of communication. We know that articulation plays necessary and important part in the formation of speech. Not only disorders of articulation frequently disregarded in our country but also few reports have been published about them. So during the past 3 years from Jan. of 1970 to Dec. of 1972, the speech clinic of the hearing and speech center, Severance Hospital made a study of 36 cases of articulation disorders and analysed their clinical and articulate aspects. So next following results were obtained. 1) Classification of articulation disorders into organic and functional showed the former to be 22 (61%) and the latter 14(39%), and among the organic disorders, short frenulum comprised 2 (9%), hare lip 2(9%) and cleft palate 18(82%). 2) In the ability of sucking, swallowing and chewing which influenced the nutrition and development, sucking and swallowing were poor in organic disorders and remains were non-specific. 3) In articulation disorders, alveolar and velar articulatory defects were significant and next were bilabial, dental and glottal. Which was obvious in organic disorders than that of functional disorders. 4) Precisely speaking, in organic disorders the initial ""ㄱ"" and ""ㅋ"" of the velar sound and initial ""ㅈ"" of the alveolar sound were the most frequent defect found comprising 82%, 73%, 73% respectively. 5) The articulatory defects of functional disorders, no any specific tendency was noticed. 6) In the vowels, no specific defects either organic or functional disorders were found.