To provide a cleaning device for waste plastics by which sand, mud and the like on the waste plastics are efficiently cleaned.

In the cleaning device for the waste plastics, a casing 4 having an inlet at its one end and an exhaust port at its other end houses a plurality of paddles 7, 7 rotated around a shaft 8. The casing 4 at its inner surface is provided with a plurality of guide blades 11 moving the waste plastics toward the exhaust port 2 from the inlet 1 accompanied by the rotation of the plurality of paddles 7, 7. The circumferences or part of the circumferences of the paddles 7, 7 in the casing 4 is provided with a mesh-, multi-aperture, or slit-bearing screen 10.