Air-permeable member with removable protective film for covering ventilation hole

A member for a ventilation hole, the member to be placed to cover a ventilation hole in order to allow passage of gas between an outside and an inside of a housing through the ventilation hole of the housing and prevent dust and/or a liquid from entering the inside from the outside through the ventilation hole, the member comprising:

• a porous membrane having air permeability in a thickness direction;
• and
• a provisional protective film joined to the porous membrane to cover the porous membrane from the outside side, wherein
• the provisional protective film is air-impermeable in a thickness direction or has lower air permeability in the thickness direction than the air permeability of the porous membrane,
• the provisional protective film and the porous membrane are joined to each other in such a manner that the provisional protective film is removable from the porous membrane,
• wherein the provisional protective film is joined to the porous membrane with an adhesive whose adhesive strength decreases by an external stimulus, and
• wherein the external stimulus is heat and/or light.