To provide a fouling separation device which enhances the durability of the device and the separation efficiency of an incorporated material and fouling greatly.

The fouling separation device is provided with a drum of which the inner side configuration is cylindrical, a rotation shaft that passes the center of the bottom face of the drum and exists extendedly to the inner side from the lower part of the drum, a motor that rotatively drives the rotation shaft and one or more of arms that exists extendedly to the radial direction of the drum from the rotation shaft within the drum and rotates integrally with the rotation shaft. Further, an removable arm head that exists extendedly to the proximity of the inner wall of the drum is fitted to the leading edge of the arm.

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