Abstract: Since the problem of Gettier, the problem of justification has become the core of contemporary western epistemology. As one of the major representives of epistemology, R M Chisholm regards justification as a normative concept, and justification object is belief, its aim is truth. About the justification structure, he constitutes a system, including the propositions that have the property of self-presenting and the priori propositions and nine evident rules. Finally, he gives the definition of justification. In the author′s opinion, the methods of logically analyzing and usual word analizing are instructive for philosophy study.