To provide a fixture, in which structure is simplified, the number of components is reduced, and an acceptable range is wide with respect to a hole dimension or a thickness of a fixed side while contributing to cost reduction.

Structure of the invention is integrated, unlike the conventional art in which a pin or the like is used for deformation. By pressing an insertion part 1 shown in Fig.1 in an arrow direction, an insertion deformation part 2 and a deformation fixing part 3 are deformed and fixed by using characteristics of plasticity of such as plastic resin. The component such as a pin is eliminated and the simplified and integrated structure exerts a sequence of functions and fixes.