MASK

A mask according to an embodiment of the present disclosure includes: a filtering structure configured to perform an air filtering function; a buckle portion coupled to the filtering structure; and a strap connected to the buckle portion and worn on a body of a user, wherein the buckle portion includes: a body coupled to the filtering structure and having openings formed on both sides thereof; and a fixing piece having one side hinged to a sidewall of the opening and gripping the strap, wherein the strap is inserted between a side surface of the fixing piece and a sidewall of the opening to surround at least a part of an outer surface of the fixing piece, and slidably moves in one direction or both directions in the buckle portion selectively according to a shape of surrounding the fixing piece. 根据本公开的实施方案的面罩包括：过滤结构，该过滤结构被构造成用于执行空气过滤功能；带扣部分，该带扣部分联接到过滤结构；和条带，该条带连接到带扣部分并且佩戴在用户的身体上，其中带扣部分包括：主体，该主体联接到过滤结构并且具有在该主体两侧形成的开口；和固定件，该固定件具有铰接到开口的侧壁的一侧并且夹持条带，其中条带插入在固定件的侧表面与开口的侧壁之间以围绕固定件的外表面的至少一部分，并且根据围绕固定件的形状选择性地在带扣部分中在一个方