Patent ID: 7318259

Claim:
A buckle made of resin comprising a buckle main body formed of a housing and an insertion body having insertion leg portions on both sides of the insertion body, wherein the buckle main body is provided with a guide groove in a longitudinal direction of a center of an inner face of the housing; the insertion body is provided with a guide lever projecting from a center of a proximal lever, the guide lever being capable of being inserted into the guide groove, a first sliding contact portion, which makes sliding pressure contact with a first opposing face, is disposed on a part of the guide groove, a second sliding contact portion, which makes sliding pressure contact with a second opposing face, is disposed on a part of the guide lever, the first sliding contact portion is provided on a distal end portion side of the guide groove and has an inclined face narrowing toward the distal end portion side, and the second sliding contact portion is provided on a proximal portion of the guide lever, and is an elevated portion being elevated toward an insertion mouth portion of the guide groove.