A spectacle frame comprising a front frame, legs, and a coupling structure mounted between the front frame and the legs for hingedly coupling the front frame and the legs, the front frame comprising at each of its lateral ends a split end piece, the coupling structure comprising: two hinge pieces, wherein each hinge piece is tightly inserted between the two portions of the split end piece such that each hinge piece protrudes, wherein each hinge piece has a stopper groove; two elastic members each formed from a plate material and bent to a substantially U-shape with an upper plate, a lower plate and a middle having elasticity, each elastic member having slots (3-1, 3-2) formed in the lower plate and the upper plate respectively, each elastic member beinglocatedbetween a respective front end of the leg and a respective end piece of the front frame where a respective hinge piece is retained, with the upper plate abutting the front end of the leg and the lower plate abutting the end piece of the front frame, such that the hinge piece is inserted through the slots (3-1, 3-2); and a rotation pin and an operating slot formed at the front end of each leg, the hinge piece passing through between the operating slot and the rotation pin being inserted into the stopper groove which is oriented in parallel to the longitudinal direction of the legs and substantially perpendicular to the rotation pin, so that the legs are rotatable about the rotation pin, a leading portion of each leg bent at a predetermined angle protruding from both sides of the rotation pin, the leading portion being disposed in sliding engagement with the upper plate of the elastic member and elastically pressing the elastic member; characterized by the fact each elastic member further comprises a protrusion which is bent at a predetermined angle in the middle of both sides of the upper plate slot, such that, when the leg is folded or unfolded, a force resisting to foldorunfoldthe leg is applied before the leading portions pass the protrusions, and an elastic force to fold or unfold the leg is applied after passing the protrusions so that a state in which the leg is folded or unfolded is maintained. two hinge pieces, wherein each hinge piece is tightly inserted between the two portions of the split end piece such that each hinge piece protrudes, wherein each hinge piece has a stopper groove; two elastic members each formed from a plate material and bent to a substantially U-shape with an upper plate, a lower plate and a middle having elasticity, each elastic member having slots (3-1, 3-2) formed in the lower plate and the upper plate respectively, each elastic member beinglocatedbetween a respective front end of the leg and a respective end piece of the front frame where a respective hinge piece is retained, with the upper plate abutting the front end of the leg and the lower plate abutting the end piece of the front frame, such that the hinge piece is inserted through the slots (3-1, 3-2); and a rotation pin and an operating slot formed at the front end of each leg, the hinge piece passing through between the operating slot and the rotation pin being inserted into the stopper groove which is oriented in parallel to the longitudinal direction of the legs and substantially perpendicular to the rotation pin, so that the legs are rotatable about the rotation pin, a leading portion of each leg bent at a predetermined angle protruding from both sides of the rotation pin, the leading portion being disposed in sliding engagement with the upper plate of the elastic member and elastically pressing the elastic member; characterized by the fact each elastic member further comprises a protrusion which is bent at a predetermined angle in the middle of both sides of the upper plate slot, such that, when the leg is folded or unfolded, a force resisting to foldorunfoldthe leg is applied before the leading portions pass the protrusions, and an elastic force to fold or unfold the leg is applied after passing the protrusions so that a state in which the leg is folded or unfolded is maintained.