Provided is a method for producing a laminated fiber body in which pulp fiber acquired by defibrating, using a defibrator, a pulp sheet drawn from pulp stock is supplied to a stacking machine together with an air flow so as to acquire a laminated fiber body in which the pulp fiber has been deposited. In this method, when a second pulp sheet drawn from new pulp stock is to be supplied to the defibrator after a first pulp sheet supplied to the defibrator, the second pulp sheet is drawn at a conveying speed faster than the conveying speed of the first pulp sheet supplied to the defibrator, the conveying speed of the second pulp sheet is decelerated so that the tip of the second pulp sheet follows the end of the first pulp sheet, the tip of the second pulp sheet is set to be in a state of contacting or approaching the end of the first pulp sheet, and the second pulp sheet is supplied following the first pulp sheet.
