The author in this work elaborates some problems about complicity in the committing a crimes. Criminal act is the act committed mostly by one person. But, today, there is more and more felonies which who are committing by several peoples, or groups of people. Therefore, the sanction must be more rigorous. In this article, author discussed about a one side of the complicity, accordingly, about a assistance in committing a crimes. Through analyses theoretical postulates in Codex trans aspects of some other authors till jurisprudence, the author concludes that this subject matter is very good elaborate, and, there is no many problems in practice. The author propose a harmonization of solutions on some aspects between the countries in the ambience, and demand more severe regard from court. The assistance in committing crime is the easiest shape of the complicity, but no less remarkable. [ABSTRACT FROM AUTHOR]