A transdermal administration device packaged body includes a transdermal administration device including an administration member housed in a container, the administration member having at least one projection protruding from a first surface of a substrate, and an outer package which houses the transdermal administration device and has a bag form including a front component and a rear component. The front component is positioned on a first surface side of the substrate, the rear component is positioned on a second surface side opposite to the first surface side of the substrate, and the front component has an opening member configured to be pulled open to open the outer package.