PURPOSE: To provide a work moving device, by which a time lag up to starting can be reduced, and a shock is not produced at the stroke end part.

CONSTITUTION: A work moving device forces a work to reciprocate by a designated amount. The rotation of a motor 2 is transmitted to a lever 5 through an electromagnetic clutch brake 3. A slide frame 7 is connected in such a manner as to freely slide to a slider 6 pivoted on the tip of the lever 5 rotated, with the base end as a fulcrum, and the slide frame 7 is guided by a fixed rack 10 and a slide shaft and moved to reciprocate by the radial displacement of the forward end pivoting part caused by the rotation of the lever 5. A pinion 8 pivoted on the slide frame 7 engages with the fixed rack 10, and the pinion 8 is rotated normally and in the reverse direction by the movement of the slide frame 7. A slide shaft which is disposed parallel to the fixed rack 10 and on which a rack engaging with a gear 9 rotated normally and in the reverse direction in synchronization with the pinion 8 is formed is moved to reciprocate by the normal and reverse rotation of the gear 9.