PROBLEM TO BE SOLVED: To provide a slag molding that has excellent handleability and can effectively improve bottom materials of the water environment and a method of producing the same.SOLUTION: A slag molding contains steel slag and is used in a water environment, the slag molding containing 4 mass% or more of a swelling material, the volume of which swells by 4.0 or more times in the water environment.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】取扱性が良好で、水環境の底質を効果的に改善できるスラグ成形体およびその製造方法を提供する。【解決手段】製鋼スラグを含み、且つ、水環境で使用されるスラグ成形体であって、水環境下において、体積が4.0倍以上に膨張する膨潤材を4質量%以上含有するスラグ成形体。【選択図】なし