This paper addresses some of the major issues of Peace Education in schools and relates music and music education to this field of knowledge. Music can be a tool to contribute to building peace. Throughout history, music and musical practices have been used to enhance relationships; learning and sharing music has been used to transform realities in diverse ways. In this regard, the paper aims to review major concerns of Peace Education in relation to music in schools, to encourage teachers to promote musical practices aimed at transforming societies and to offer examples of different projects that have made use of music education to contribute to peacebuilding.