A packaged acetaminophen injection solution preparation comprising: an oxygen-impermeable packaging container, and an acetaminophen injection solution preparation including a sealed oxygen-permeable container and an acetaminophen aqueous solution of pH 4 to 8 containing acetaminophen as an active ingredient filled in said sealed oxygen-permeable container, and an oxygen scavenger, wherein: - said acetaminophen injection solution preparation is a moist heat-sterilized acetaminophen injection solution preparation, - said oxygen-impermeable packaging container encloses said moist heat-sterilized acetaminophen injection solution preparation and said oxygen scavenger, and is sealed, - said sealed oxygen-permeable container is a flexible container made of an oxygen-permeable film or sheet of organic polymer selected from polyethylene resin, polypropylene resin, a mixture of polyethylene resin and polypropylene resin, ethylene-vinyl acetate copolymer, polyvinyl chloride resin, or of an organic polymer composition in which a solid organic polymer as a base is incorporated with a plasticizer or a compatible soft organic polymer, and - said oxygen-permeable container has an oxygen permeability not lower than 500 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), - said oxygen-impermeable packaging container has an oxygen permeability not higher than 1.0 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), and - said oxygen scavenger is positioned in a space between said sealed oxygen-impermeable container and said moist heat-sterilized acetaminophen injection solution preparation to absorb oxygen within said sealed oxygen-impermeable packaging container. an oxygen-impermeable packaging container, and an acetaminophen injection solution preparation including a sealed oxygen-permeable container and an acetaminophen aqueous solution of pH 4 to 8 containing acetaminophen as an active ingredient filled in said sealed oxygen-permeable container, and an oxygen scavenger, wherein: - said acetaminophen injection solution preparation is a moist heat-sterilized acetaminophen injection solution preparation, - said oxygen-impermeable packaging container encloses said moist heat-sterilized acetaminophen injection solution preparation and said oxygen scavenger, and is sealed, - said sealed oxygen-permeable container is a flexible container made of an oxygen-permeable - said acetaminophen injection solution preparation is a moist heat-sterilized acetaminophen injection solution preparation, - said oxygen-impermeable packaging container encloses said moist heat-sterilized acetaminophen injection solution preparation and said oxygen scavenger, and is sealed, - said sealed oxygen-permeable container is a flexible container made of an oxygen-permeable film or sheet of organic polymer selected from polyethylene resin, polypropylene resin, a mixture of polyethylene resin and polypropylene resin, ethylene-vinyl acetate copolymer, polyvinyl chloride resin, or of an organic polymer composition in which a solid organic polymer as a base is incorporated with a plasticizer or a compatible soft organic polymer, and - said oxygen-permeable container has an oxygen permeability not lower than 500 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), - said oxygen-impermeable packaging container has an oxygen permeability not higher than 1.0 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), and - said oxygen scavenger is positioned in a space between said sealed oxygen-impermeable container and said moist heat-sterilized acetaminophen injection solution preparation to absorb oxygen within said sealed oxygen-impermeable packaging container. - said oxygen-permeable container has an oxygen permeability not lower than 500 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), - said oxygen-impermeable packaging container has an oxygen permeability not higher than 1.0 cm 3 /m 2 /day measured at 23 degree C and 90% RH under normal pressure (1013 hPa), and - said oxygen scavenger is positioned in a space between said sealed oxygen-impermeable container and said moist heat-sterilized acetaminophen injection solution preparation to absorb oxygen within said sealed oxygen-impermeable packaging container.