Model

To couple two sections together such that said two sections are capable of relative rotation, and are capable of being reliably held in a post-rotation state. This model (101) is provided with: arm parts (104) each provided with a rotational shaft part (110); and a torso part (103) which is provided with shaft support parts (111), and which is coupled to the arm parts (104) so as to be capable of relative rotation. A protrusion (112) is provided to each of the arm parts (104). In the torso part (103), recesses (113) are provided which have the protrusions (112) fitted thereto following insertion of the rotational shaft parts (110) into the shaft support parts (111). Engagement parts (121, 122) are respectively provided to the rotational shaft parts (110) and the shaft support parts (111). The engagement parts (121, 122) engage with each other, and restrict movement of the rotational shaft parts (110) in the axial direction between a first position in which the protrusions (112) are fitted to the recesses (113