„Music is a higher revelation than all wisdom and philosophy.“ (Ludwig van Beethoven) The prehistoric man used music to appease the spirits, and today research is being conducted on the influence of music on physiological functions. With the development of the holistic approach and the increased awareness of the importance of medicine, music started being included in contemporary concepts of treatment in psychotherapy. Music is increasingly appreciated and used in the areas of physical medicine and rehabilitation. It is one of the best ways of calming and relaxing, stimulating growth and development, enhancing communication and speech, developing creativity and motor skills. It has been proved that music has a positive impact on an individual’s intelligence. For the purposes of this work I have observed children’s reactions to music and clarified the work of primary preschool teachers in musical activities. The work explores the effects of music therapy on an individual, as well as the effects of individual elements of a musical composition. Various forms of music therapy are described, which are most often aimed at people with developmental difficulties. The term "developmental difficulty" denotes congenital and acquired damage of various types, causes and degrees. Autistic spectrum disorders are classified as neurodevelopmental disorders which appear in early childhood. The symptoms include deficits in social communication and social interaction, stereotypical patterns of behavior, restricted interests, and non-specific problems such as fears, phobias, aggression, auto-aggression and others. While working with children it is necessary to use music as much as possible, because children have a distinct need to move and change between static and dynamic activities. Thus music therapy engages the entire body of the child, contributing to health and the quality of life. Music also encourages socialization, emotional development, and is a purposeful and enjoyable activity. For these reasons musical activities are an important factor in working with children with autistic spectrum disorders. In activities with children with autistic spectrum disorders, emphasis should be put on the child's development and progress. Music should be ever-present in activities that are carried out in educational institutions.