The article characterizes the peculiarities of contesting debtor’s transactions in bankruptcy proceedings in comparison with the general procedure of contesting transactions. The author considers the peculiarities of separate elements of the legal mechanism of challenging transactions, highlights the discussion issues. The conclusion is made that the differences of contestation of transactions of the debtor in bankruptcy from contestation of transactions within the framework of the general order are conditioned by the specificity of public relations, formed in the sphere of application of norms of the Federal Law of 26 October 2002 № 127-FZ “On insolvency (bankruptcy)”, and the necessity of solving the task of satisfying the interests of creditors.