This paper is discussion of an aspect and problem of a ‘말소리’ unit in the High School Grammar Textbook. I considered the change, a contents organization and a construction organization of a ‘말소리’ unit in The High School Grammar Textbook. The High School Grammar Textbook has served as a messenger of school grammar and a realizer of Korean Language Curriculum from 4th Korean Language Curriculum(1985) to 7th Korean Language Curriculum(present).
A 『Grammar』 of 4th~5th Korean Language Curriculum was an academic knowledge transmission-centered textbook. A 『Grammar』 of 6th~7th Korean Language Curriculum was an practical knowledge transmission-centered textbook. We have known that it was a larger number of class activity than a number of learning contents in quantitative content construction of a ‘말소리’ unit. And then I have examine a problems in a ‘말소리’ unit. The problems in a ‘말소리’ unit were a problem of terminology, a problems of contents, and a problem of constructions.