According to one embodiment of the present invention, in the fastening device inserted into the first fastening member and the second fastening member, in the engaged state in which the first fastening member and the second fastening member are engaged, A fixing unit for generating a frictional force in contact with an inner surface of the first fastening member when the first fastening member is located inside the first fastening member; And an engaging portion located below the fixing portion and engaging with the second engaging member; Wherein the fastening portion is formed by at least one projecting portion having an elastic force so as to prevent the fastening device from being loosened.
展开▼
