A vent opening of the ship is provided. According to this embodiment, a plurality of dampers disposed in the vent of the hull, rotatably supported on both sides of the vent; A plurality of rotating shafts coupled to one side of each damper through one side of the vent; A link unit coupled to the respective rotating shafts in a two-section link structure; An extension rod extending from the link portion and having a slot formed along a longitudinal direction thereof; And a joint portion is formed to be movably inserted into the slot of the extension rod, an insertion hole is formed to insert the end portion of the extension rod, and folded from the extension rod by the joint portion when separated from the end portion of the extension rod. It provides a vent opening and closing device of the ship comprising a pressure lever.
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