In this research, we made the sheet of PMMA filled with the waste marble powder which was formed on finishing of the marble surface. Waste marble powder could be used for the filler in polymers. Waste marble powder was swelled in the syrup fo MMA. And then IPN was formed with PMMA by polymerization. The sheet of PMMA was measured for tensile strength, impact strength and surface hardness. It proved that the properties of PMMA sheet with 100phr in contents of the waste marble powder and 3wt% of di-functional cross-linking agent were greatest.