A ventilation member of the present invention includes: a support having a through hole serving as an air passage between an interior space and an exterior space of a housing when the support is attached to the opening of the housing; a filter member disposed on the support to cover an aperture of the through hole that opens into the interior space; and an air-permeable membrane disposed on the support to cover an aperture of the through hole that opens into the exterior space. The through hole includes: a first air passage extending in a predetermined direction from one end of the first air passage to the other end of the first air passage, the one end forming the aperture that opens into the interior space; a second air passage having one end connected to a side of the first air passage and the other end forming the aperture that opens into the exterior space; and a dead end passage extending in the predetermined direction from the other end of the first air passage.