PURPOSE: To obtain an inner separating sheet capable of preventing the taste of food from being worsened due to the condensation taking place on the inner wall of a container by a method wherein a laminate structure is formed of a hydrophobic sheet and a cushioning layer and said structure is provided with a water resistance and a gas permeability, each being not lees than the specific value.

CONSTITUTION: A sheet having a hydrophobic sheet and a cushioning layer built up in layers and a water resistance of at least 5cm and a gas permeability of at least 10cc/cm2/sec is placed under the bottom of food and/or on the top thereof with the hydrophobic sheet side in contact with the food. It is preferable, in the manufacture of the hydrophobic sheet, to use a melt blow nonwoven fabric made from polyolefin resin such as polyethylene and polypropylene, capable of meeting the above-mentioned requirements of the water resistance and gas permeability and having an average fiber size of at least 10μ in diameter and a unit weight of 3-50g/m2 preferably 5-30g/m2.