Purpose: The audiometric calibration is an essential prerequisite by priority for securing the reliability of audiometric test result. This review aims to help understanding the calibration procedure to determine whether the performance characteristics of speech audiometer conform to relevant standards or not and calibrate the speech audiometer if necessary. Methods: The performance characteristics of the speech audiometer are introduced in reference to the newest version of international and national standards, the electro-acoustic calibration procedures of speech and masking signals used in the speech audiometer are focused and explained. Results: According to the newest standards (ISO & KS I ISO 8253-3, IEC & KS C IEC 60645-2, ANSI S3.6) related to the speech audiometer, the calibration check items of the speech audiometer include the performance characteristics of the monitoring meter, reference threshold levels of speech, frequency response, playback device, microphone, harmonic distortion and masking signals, in addition to the calibration check items of the pure tone audiometer. Conclusion: The calibration procedure of the speech audiometer in the clinical audiometer which supports both pure tone audiometry and speech audiometry is almost similar with the calibration procedure of the pure tone audiometer except for the check of several additional calibration items stated above. However, if the pure tone audiometry and the speech audiometry are separate equipments, cross-talk of the speech audiometry, linearity of output level and masking level control should be checked in the same way with the calibration check of the pure tone audiometry.