With the growing number of demand and interest for hearing aid, it has become a one of the major field of interest for hard of hearing problem. Although there are rapidly increasing demand and supply of this hearing aid since early 1970th, there are many misunderstanding and mismanagement of these hearing aids among user and even doctors. For these reasons the authors et al. had established hearing aid clinic in department of E.N.T. Severance Hospital in 1973 and had a questionaire study of the recent trend and actuality of hearing aid use in Korea and compaired these data as a direct purchase group with the result of clinical fitting method which we adapted since 1973. The results were as follows ; 1) Only 24.3% of direct purchase group may had audiologic test at hospital and the remainder had purchased it directly from the unqualified hearing aid dealer. 2) The hearing aid supply has rapidly grown since 1970 in Korea. 3) More than 90% of hearing aids were pocket type with strong gain. 4) Hearing loss type of clinical fitting group were ; over 80% were sensory-neural and no one case of conductive hearing loss. 5) Degree of hearing loss were ; Among the children of preschool age ; 54.7% were profound hearing loss and the remainder were also more than moderately severe which were unable to communicate without hearing aid. On the other hand, only 29.5% of adult group were profound deaf and the remainder were diversely distributed even down to mild hearing loss. This result was interpreted as the child were hearing aid only when they are absolutely indicated and the adult were whenever they need it according to their business and social activity. 6) Degree of help among direct purchase group were ; Very satisfactory-13.5%, Some help-64.9% and among clinical fitting group ; all of them had gain for speech detection or speech reception threshold averaging 30 to 40 dB. But interestingly enough most of them except profound sensory neural hearing loss group had rather loss of discrimination score. There were interpreted as they may be caused by unadapted distorted elecric sound and they may show increasement after atditory training. 7) The result which we could test early child even under 3 years old and can fit hearing aid with fair result were considered to be the great step up for hard of hearing problem.