To provide a dewfall-preventing cover for outdoor use, capable of preventing the dewfall by absorbing water emanated from the object to be covered by using a waterproof sheet having a water-absorbing layer capable of reversibly absorbing and releasing moisture, and excellent in wear resistance, and also having waterproof properties, light-shielding properties and air- permeability.

This cover 1 for outdoor use, and for covering the stack object such as farm products is obtained by connecting dewfall-preventing waterproof sheet 2 with a light-shielding air-permeable sheet 3. The dewfall-preventing cover 1 for outdoor use is characterized by constituting the light-shielding air- permeable sheet 3 so as to cover at least a part of the side face part of the object, and forming the dewfall-preventing waterproof sheet 2 by laminating a water-absorbing layer and a waterproof layer.