Based on the established traditions of primary learning to play the button accordion, the author seeks to take into account the current achievements of children's musical pedagogy, summarizes the experience of leading Russian specialists. Such a publication is designed to facilitate the work of teachers of children's music schools at the initial stage of training, to provide an opportunity for children and their parents to more independently master the basics of learning to play the button accordion. The necessary theoretical and methodological information is presented in a clear and accessible form.