To provide a waste material chamfering device which supplies a recycle material having round corners with a stable size only by applying a simple chamfering for waste materials such as waste roof tiles or the like.

The waste material chamfering device comprises: a support base part 1 for supporting the whole device on the installation horizontal plane; a rotary shaft 2 parallel to the installation horizontal plane provided on the support base part 1; a drum support part 3 which is supported on the support base part 1 through the rotary shaft 2 and rotates for a predetermined angle around the rotary shaft 2; the rotary shaft 4 provided on the drum support part 3 in the approximately vertical to the rotary shaft 2; an approximately cylindrical turning drum 5 which is turnable around the rotary shaft 4 and has an opened bottom surface; a plurality of plate-like agitating impeller vanes 6 provided on a cylinder inner wall of the turning drum 5; and a polishing material 10 which is much charged with the waste material in the turning drum 5 and polishes the waste material.

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