Criminal law operates under the assumption that persons have the capacity for free, voluntary choice. However, since the concept of free will and self-determination may be understood in a variety of ways, it must be made the subject of philosophical scrutiny if it is to provide a solid foundation for law. This paper will present two major philosophical concepts of self-determination and evaluate their utility for criminal law. The conclusion delineates the possibilities and limitations of these concepts when applied in particular to the field of criminal law.