Musicology Annotation << Back Analysis of the Concept of "Interest" in the Field of Pedagogy of Musical and Instrumental Performance Blok Oleg A. The article reveals approaches to the study of the concept of "interest" as a didactic principle, a personal property of students in the class of instrumentalists. The idea is emphasized that the understanding of the phenomenon remains an urgent problem in the field of pedagogy of music education, instrumental performance. The analytical spectrum includes works: P.K. Anokhina, N.A. Bernstein, L.L. Bochkareva, A.V. Zaporozhets, P.I. Zinchenko, B.G. Meshcheryakova, S.L. Rubinstein, V.I. Petrushina, O.A. Blok, O.F. Shulpyakova and others. The following provisions are formed: “interest” is a didactic principle, which is distinguished by its polyfunctionality. Includes: organizational; content-educational; motivational; cognitive; communicative; value-orientation; cognitive; psycho-motor; educational; artistic and creative functions, etc.; interest as a property of the personality of an instrumentalist can have opposite qualitative characteristics: deep – superficial; stable – changing; purposeful – undefi ned; holistic – fragmented; systemic-sequential – chaotic; synthesized – differentiated; stable – intermittent; deductive – inductive; traditional – exclusive; conscious – unconscious; competent use of pedagogical demonstration (harmonious combination of expressive playing on the instrument and verbal and logical explanation), the concepts of anticipatory refl ection by P.K. Anokhin, motor activity N.A. Bernstein, the productive perception of P.I. Zinchenko, psychomotor unity of O.F. Shulpyakov, the mechanism of “emotional anticipation” by A.V. Zaporozhets make it possible to optimize the musical and educational process in the instrumentalist class through the understanding of the concept of "interest" and the search for appropriate technological solutions. It is pointed out that the prospects for research on the chosen issues are seen in the further development of concepts that reflect modern trends in music education, the specifics of the formation of the phenomenon in new socio-cultural conditions. Keywords: interest of studying instrumentalists, pedagogy of musical performance, musical and educational process, formation, teacher-musician, performing technique, performing actions-movements. DOI: 10.25791/musicology.3.2022.1240 Pp. 23-29.