Statement of problem: Low limits of fracture resistance of feldspathic porcelain laminate veneers andthe need for other substitutions that can withstand more mechanical forces. Aim:The aim of this study was to examine the role of different ultra-translucent monolithic zirconia on marginal gap and fracture resistance values for laminate veneers. Materials and methods: Thirty prepared fiber reinforced resin abutments were milled and used in this study. Thirty laminate veneers were milled from different ultra-translucent monolithic zirconia blanks [Group D (DDcubeX²), Group P (Prettau Anterior) and Group K (KATANA UTML)] and divided into 3 groups (n=10) then sintered. All the veneers were sandblasted, treated by ceramic primer and cemented to the abutments. All specimens were suspected for evaluation of marginal adaptation using stereo-microscope and a Universal testing machine was used to assess fracture resistance. Results: Statistical difference was found in marginal gap values between Group Dand the other groups (Group PandGroup K). Statistical mean load difference was found between Group D and the other groups (Group P and Group K). Conclusion:type of monolithic translucent zirconia was found to significantly affect the marginal adaptation and fracture resistance. Key words:Monolithic translucent zirconia, laminate veneers, fracture resistance, marginal adaptation.