This study evaluates the effect of two different finish line design (shoulder and deep chamfer) on the marginal accuracy and internal adaptation of two restorative materials (Paradigm MZ100 and SR Adoro). Twenty crowns were made and grouped into four groups n=5 (SR Adoro crowns with deep chamfer, SR Adoro crowns with shoulder, Paradigm MZ100 crowns with deep chamfer and Paradigm MZ100 crowns with shoulder finish line). Internal adaptation was evaluated using replica technique and marginal accuracy was evaluated using stereomicroscope. The lowest mean value of internal adaptation scored with SR Adoro crowns with deep chamfer (99.6 μm) ,then SRAdoro crowns with shoulder (118.4 μm), followed by Paradigm MZ100 crowns with deep chamfer (182 μm) and the largest value recorded with ParadigmMZ100 crowns with shoulder finish line (206 μm). Also, the lowest mean value of marginal gap scored with SR Adoro crowns with deep chamfer (23.3 ±11.970μm) ,then SR Adoro crowns with shoulder (24.7±12.537 μm), followed byParadigm MZ100 crowns with deep chamfer (30.2± 15.773μm) and the largest value recorded with Paradigm MZ100 crowns with shoulder finish line (41.0±18.519 μm). It was concluded that SR Adoro crowns had better internal adaptation and marginal gap overall mean values when compared to ParadigmMZ100 crowns with both finish line designs. Crowns with deep chamfer finish line design fabricated from both Paradigm MZ100 and SR Adoro recorded better internal adaptation and marginal gap overall mean values when compared to crowns with shoulder finish line design.