To provide a moving device achieving improved efficiency in sending, and prevention of skipping of teeth by dropping shock and biting at a moving terminal end, while being miniaturized.

In this moving device composed of a screw-shaped first member rotatably supported, and a screw-shaped second member 3 engaged with a screw head of the first member, and moved in the axial direction of the first member by the rotation of the first member, the shape of the screw head represented on an axial cross-section of the first member is composed of a slant face having two different apex angles of a first slant face 2a at a basic side of the screw head and a second slant face 2b at a tip side of the screw head, the apex angle of the first slant face is smaller than that of the second slant face, and a guide portion 4a for moving the second member in the outer diameter direction of the first member is mounted on a stopper means 4 for deciding a limit of the axial movement of the second member.