An airtight sealed package with a device sealed therein in an airtight manner under vacuum, the device being placed in a space defined in the airtight sealed package by a lid and a substrate, includes at least one pressure adjustment unit provided on at least one of the lid and the substrate, and configured to receive energy from an outside of the airtight sealed package, with the device sealed in the airtight manner in the airtight sealed package, to adjust pressure in the space. An energy transmission member transmits the energy to the pressure adjustment unit.