PROBLEM TO BE SOLVED: To provide a recycling method for a construction sludge capable of regenerating the construction sludge discharged being accompanied by an excavation work related to a construction work as a roadbed matter. SOLUTION: In the recycling method for the construction sludge, the construction sludge is granulated by adding solidifying agent made of a cement, water and an addition agent into a dehydrate cake obtained by dehydration of the construction sludge and kneading them, the obtained and granulated matter is dried after curing in water for a certain period, and the regenerated crusher- run and/or regenerated and grain-size adjusted crushed stone is gained by mixing the granulated matter of the predermined grain-size gained by classifying the granulated matter after the drying with a crushed matter of the predermined grain size gained by classifying after crushing the concrete shell.
