The purpose of our study is to identify the developing potential of musical stage images in terms of the development of empathy of seventh-graders. In the course of the study, we elaborated an algorithm for development of empathy of adolescents, in which the main idea is to create conditions for the manifestation of the subjectivity of the position of schoolchildren. This algorithm is based on the theory of gradual assimilation of mental actions by P.Ya. Galperin, where the methods of developing empathy (heuristic conversation, cinquain, stage dialogues and monologue of the hero) are subordinated to its stages (formation of motivation, creation of an indicative basis for action, formation of materialized action, stages of formation of mental actions in external and internal speech, automation of action). The following part of this article presents the results of the experiment, in which 47 seven grade students, ages 13–14, from Irkutsk secondary school No. 65 took part. To determine the initial level of the seventh-graders empathy, we used a standardized test “Diagnosis the level of empathy” by V.V. Boyko, which includes six components (rational, emotional, intuitive channels; attitudes that promote or hinder empathy; penetrating ability; identification). To develop the empathy in the experimental group of students of the 7th grade, 6 lessons were held, where taking into account the students conscious, heartfelt attitude to the topic, ideas and images two musical and dramatic works were used: Glinka's Opera “Ivan Susanin” (“Life for the Tsar”) and L. Bernstein's musical “West side story”. The data obtained in the course of the study indicate the effectiveness of the algorithm for developing empathy of seventh-graders based on musical and stage images, which is confirmed by the method of statistical testing of hypotheses using the Student's t-test.