Brainstem evoked response audiometry is a very important audiometry for the evaluation of hearing threshold in the patients such as infants, the mentally retarded, unconscious patients and malingerers whose hearing status cannot be evaluated with conventional hearing tests, and is very useful in localizing the sites of lesion in otoneurological diseases. However, until present, standardization of test procedures and interpretation of obtained data is not established. And the comparisons between the data from various laboratories and clinics are not possible. Therefore, each clinic should procure its own criteria for the clinical purposes. This study obtained standard result of BERA in normal control group, and it was compared with the result of experimental patient group. The results are as follows : 1) Absolute and relative latencies of each wave were obtained in control group from 62.5- dB HL to 92.5- dB HL. Latencies decreased as intensities of stimuli increased. 2) I-III interwave latency was decreased at 62.5- dB HL than 82.5- dB HL due to prolongation of latency of wave I in control group. 3) The statistical difference in test and retest between the responses for different polarities, intensities, masked and unmasked responses were not observed in control data. 4) I-III and I-V interwave latencies were decreased due to prolongation of latency of wave I in groups of conductive hearing loss and cochlear hearing loss. 5) I V interwave latency was increased due to prolongation of latencies of wave IV,V,VI in group of retrocochlear hearing loss, and limit value of I-V interval was 4.47 msec and limit value of interaural latency difference of wave V was 0.21 msec for detection of retrocochlear pathology. 6) The morphological variations of ABR in control and experimental groups were similar with the result of Chiappa et al. (1979), but A-form was found at 62.5- dB HL. Therefore, intensity of 82.5- dB HL in 4 KHz filtered click was recommended for the purpose of otoneurological diagnosis.