| 摘要 |
A vent structure 100A of the present invention includes a housing 91 and a vent member 13A attached to an opening portion 91k of the housing 91. The vent member 13A is provided with a support body 11 having a through hole 11h to serve as a gas passage between the interior and the exterior of the housing 91 and a gas permeable membrane 6 fixed to the support body 11 so as to close the through hole 11h. Assuming that a thickness direction of the gas permeable membrane is a height direction, a height H1 of the support body 11 from a second opening end face 11q (aligned with an outer surface 91p of the housing 91) to a first opening end face 11p on the other side is set to 4 mm or more.
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