The calling of Piri has been publicly criticized by the music circle following the determination by educational authorities of Piri as a musical instrument required by the curriculum of primary and middle schools after music curriculum was reorganized (1973). The criticism has been focused on whether Piri is Korean classical musical instrument or recorder. The content of Piri analyzed in primary school text books was all about recorder. Therefore the study and research have been made with various relevant books and publications as to if Piri as the name of musical instrument can be used for recorder which is not Korean classical musical instrument. The study and research of function of recorder being used as musical training aid have produced the following result. 1. Piri as Korean classical musical instrument can be broken down into Hyang-Piri, Sae-Piri, and Tang-Piri. Further, recorder can be called Piri just as wood instrument is generally called Piri. 2. Questionnaire on the functions of Piri (recorder) being used at present time have been conducted against music teachers of primary, middle, and high schools along with collection of Piris. The result of this research through questionnaire and sample collection reveals that the accuracy of musical scale and interval of Piri is about 50 percent. 3. Accurate manufacturing by production companies is strongly urged and administrative correction by education authorities concerned is further recommended.