Buckle

A buckle, comprising:

• a male member;
• and
• a female member in which the male member is inserted and engaged, wherein
• the male member includes:
• a base portion to which a string member can be attached;
• a pair of leg portions that are projected from the base portion and elastically deformable in a direction intersecting an insertion direction of the male member;
• and an engaging portion that is provided to each of the leg portions and engageable with the female member,
• the base portion includes a projected portion that is projected in a projecting direction of the leg portions from a formation side of the leg portions, the projected portion projected in such a manner that a projecting amount gradually increases from width-direction ends of the base portion toward a center, wherein the projected portion is formed in a triangle shape having oblique sides extending from the width-direction ends of the base portion toward the center,
• each of the leg portions has an outer leg piece and an inner leg piece that are each elastically deformable in the direction intersecting the insertion direction of the male member, tip ends of the outer leg piece and the inner leg piece connected with each other, and
• a base end of the inner leg piece is positioned substantially at a middle part of the oblique side of the projected portion.