A cutting machine is provided with a cutting blade for cutting a bookbinding article, a blade receiving part 19 for receiving the cutting edge of the cutting blade, and an adjusting mechanism 60 for adjusting the position of the blade receiving part 19 so that one side 191 and other side 192 of the blade receiving part move towards or away from the cutting edge of the cutting blade not only by the same degree but also by different degrees from each other. The positions of the one side 191 and other side 192 of the blade receiving part 19 can each be adjusted.