Abstract: The object of the research is the term 'reasonable interest' and 'business purpose' during exercising the subjective right to information by a minority participant of corporation. The problem is that there is no single opinion both in doctrine and practice regarding the aforesaid terms as well as criteria of good faith of a minority participant during exercising of right to information about corporation activity. The subject of the research is different doctrinal interpretations of the terms 'interest', 'balance of interests', 'good faith of a minority participant in the process of gaining information' and judicial practice. The methodological basis of the research includes the following methods: analysis, synthesis, comparative legal, systemic structural, formal legal, theoretical prognostical methods and interpretation of law. The novelty of the research is caused by the fact that the author offers a list of criteria of good faith of a minority participant when a participant seeks to get access to information. This provision must be reflected at the level of corporation local acts which will reduce the level of corporate conflicts to the minimum.