PURPOSE: To permit objects to be packaged airtight in wrapping film in close contact therewith without providing air holes in the package by a method wherein the objects and a gas absorbing agent are packaged airtight in a heat shrinkable synthetic resin wrapping film, the air sealed in the film package is allowed to be absorbed by the gas absorbing agent and the film is made to shrink by heating.

CONSTITUTION: A predetermined amount of objects 3 to be packaged and a deoxidizing agent 6 are placed on a tray 1. The tray 1, the objects 3 and the deoxidizing agent 6 are covered with a pair of upper and lower heat shrinkable and gas-barrier sheetlike wrapping film 5 and the peripheral edges of such films are heat sealed airtightly to form a package 8. This package 8 is allowed to stand for 24 hours in a cooled and dark place. During this time, since the deoxidizing agent 6 absorbs oxygen completely from air in the package 8, the volume of the sealed air is decreased and the wrapping film 5 becomes baggy as a result. The package 8 is then heated by a heating device to shrink the baggy wrapping film 5, whereby there is obtained the package 8 having the wrapping film 5 adhered closely to the tray 1 and the objects 3.