Abstract: The present invention relates to a method of automatically cutting indexes and an automatic index cutting machine for carrying out the method. The index cutting machine is constructed of number of modules where each module includes a counting arrangement which functions to count a predetermined number of pages automatically for a specific index indentation, and a knife arrangement for cutting this predetermined number of pages. The book is transported between the modules hanging from a transporting arrangement which includes a transporter to hold the book hanging from its spine. Each module counts up to an index indentation and the index indentation is then cut in the knife arrangement, whereafter the book is transported to the next module in which a count is made to the next index indentation and this index indentation is cut. This procedure is repeated module after module.