A clip , comprising: a male member including a head portion and a shaft portion provided below the head portion ; a female member including a locking leg portion forming an insertion hole into which the shaft portion is inserted, and a flange portion provided on an upper-side periphery of the locking leg portion ; and an engagement device restraining the head portion in the flange portion substantially at the same time when the locking leg portion comes to a use state by pushing the shaft portion into the insertion hole , wherein the engagement device is formed by a claw portion provided in one of the head portion and the flange portion , and a hole portion provided in another of the head portion and the flange portion , and engaging the claw portion , and the claw portion in a use state projects to a first piece portion which is elastically moveable, and one portion of a hole forming portion defining the hole portion is elastically moveable by the hole portion , said clip being characterized in that a second piece portion of the head portion , which comprises said claw portion elastically moves by a slit passing through the head portion , and the flange portion includes a periphery wall for housing the head portion , and the periphery wall has the hole portion to pass through approximately horizontally, the head portion has preferably an approximately rectangular shape, the shaft portion is provided to project at a center of a lower face of the head portion in an approximately rectangular column shape, and the respective slits have a straight groove shape, and in the periphery wall , there are provided notch portions on both sides notched in an arc shape; and elastically moveable said first piece portions provided corresponding to both notch portions , each first piece portion has respectively one hole portion , and can move to be displaced by the presence of the hole portion passing through the inside and outside of the periphery wall . a male member including a head portion and a shaft portion provided below the head portion ; a female member including a locking leg portion forming an insertion hole into which the shaft portion is inserted, and a flange portion provided on an upper-side periphery of the locking leg portion ; and an engagement device restraining the head portion in the flange portion substantially at the same time when the locking leg portion comes to a use state by pushing the shaft portion into the insertion hole , wherein the engagement device is formed by a claw portion provided in one of the head portion and the flange portion , and a hole portion provided in another of the head portion and the flange portion , and engaging the claw portion , and the claw portion in a use state projects to a first piece portion which is elastically moveable, and one portion of a hole forming portion defining the hole portion is elastically moveable by the hole portion , said clip being characterized in that a second piece portion of the head portion , which comprises said claw portion elastically moves by a slit passing through the head portion , and the flange portion includes a periphery wall for housing the head portion , and the periphery wall has the hole portion to pass through approximately horizontally, the head portion has preferably an approximately rectangular shape, the shaft portion is provided to project at a center of a lower face of the head portion in an approximately rectangular column shape, and the respective slits have a straight groove shape, and in the periphery wall , there are provided notch portions on both sides notched in an arc shape; and elastically moveable said first piece portions provided corresponding to both notch portions , each first piece portion has respectively one hole portion , and can move to be displaced by the presence of the hole portion passing through the inside and outside of the periphery wall . <EOS>