Among 568 Korean high-school boys the range of the fundamental frequency of singing voice was investigated on the most popular method of measurement for the frequency range of phonation. The student is instructed to sing ascending musical scales, starting with a tone of middle c¹(261.63 Hz), which can be sung easily in the model register accompanied by the piano. The highest physiological tone was determined by matching the vocal tone with the tone produced by the piano. In the same manner, the lowest tone was also determined while singing descending scales. The highest and the lowest musical tones are also determined during the procedures. The frequency interval of the range was presented into a staff notation and key board of the piano. On the other hand, the frequency range of 434 in five music textbooks, which were edited for the student by the Korean Ministry of Education, was analyzed in the same way. And also simultaneously compared with these two frequencies and the appropriateness of using these textbooks for the high-school boy in singing was evaluated, and the following results were obtained. 1) Highest physical tone(HPT) and lowest physical tone(LPT) for the student are C^3#(1108.73 Hz) and H(123.47 Hz) and average physical frequency range of phonation(PFRP) revealed as 26 semitones(f/174.61 Hz-g²/783.99 Hz). 2) Highest musical tone(HMT) and lowest musical tone(LMT) for the student are a²(880.00 Hz) and f(174.61 Hz), and average musical frequency range of phonation(MERP) revealed as 17 semitones a/220.00 Hz-d²/587.33 Hz). 3) Highest and lowest tone in frequency range of 434 songs in textbooks of music are a²(880.00 Hz) and g(196.00 Hz) ; average frequency range of songs revealed as 20 semitones(a/220.00 Hz-f²/698.46 Hz). According to the above result, in comparison with average frequency range of songs musical score(20 semitones, a-f²) and the average musical frequency range of phonation on 17 semitones(a-d²), it was suggested that special consideration especially for the adjusted arrangement of frequency range of songs as musical score to average musical frequency range of actual phonation for the student be expected.