ENArticle discusses relevancies, peculiarities of legal regulation of complex forensic examination and commission forensic examinations by analyzing relevant and controversial aspects of criminal procedural regulation. The analysation of the mentioned institute is performed by presenting of legal regulation of complex forensic examination and commission forensic examinations in three foreign countries - Russia, Belorussia and Kazakhstan and afterwards presenting its regulation in Lithuania. The analyses of legal norms regulating complex forensic examination and commission forensic examinations revealed that usually they are implemented not into codes of criminal procedure or special laws but in lower legal acts. The exceptions were found only in several countries the legal norms of which were analyzed in this article. The analyses of Lithuanian regulation showed that complex forensic examination and commission forensic examinations are defined only in several lower legal acts and some essential differences in them was found which should be evaluated and revised. There should be emphasized that all legal acts regulating complex forensic examination and commission forensic examinations should present the same, unambiguous definitions of said institutes. Also the analyses performed revealed the necessity to prepare and adopt unified classification of forensic examination.