method of regeneration of plastics material with higher quality from scrapped plastics , in which scrapped plastics having deteriorated surface layer caused by , such as , exposure to ultraviolet rays etc . are chopped , broken or crushed into fragmented product and this product is subjected to agitation in the presence of aqueous medium and solid particles exhibiting higher hardness than the product to scrape off the deteriorated surface layer of the scrapped plastics , whereupon the plastics material is recovered .