PROBLEM TO BE SOLVED: To provide a solidification material for coal ash where the coal ash mixed with water and the like can be molded into an arbitrary shape and firmly solidified and where the elution of a cation and an anion containing a heavy metal and the like can be suppressed and to provide a method for producing solidified matter which can be used in a wide range of applications such as building and civil engineering materials and the like.SOLUTION: A solidification material for coal ash includes the burned product of a mixture of at least one of Ca(OH)and CaCOand Al(OH). The solidification material for coal ash is blended with the coal ash, water and another raw material if necessary, kneaded and made pasty. Solidified matter can be produced by that a pasty material is molded into an arbitrary shape and solidified.
