The study attempts to examine the authenticity of the advice in the KSL textbooks by comparatively analyzing the advices in the conversations of the textbooks and the advices produced by Korean Native Speakers in terms of the rate of the occurrence, the degree of the directness, and the grammar patterns as conventional indicators. For the study, 28 conversation texts in the 16 textbooks and DCT data collected from the 103 Koreans are utilized. The results of the study are as follows: First, the results of the DCT data display a comparatively high rate of occurrence in the similar contexts as the textbooks. Second, in terms of the degree of the directness, the first class is distinctively used in the textbooks, while the second class is most frequently used in DCT. Third, the list of the grammar patterns that are used for advices in the textbooks and the DCT shows a similarity in a great part. In terms of the rate of the occurrence, however, they present a lot different patterns. (Pukyong National University)