Objective:To determine the shear bond strengths of veneering porcelains via heat-pressed method or powder-liquid method to machinable zirconia cores. Methods:Bilayered zirconia/veneer blocks were fabricated with two brands of zirconia cores and two different veneering porcelains,using a heat-pressed layering technique or a conventional powder-liquid layering technique. Initial shear bond strengths between veneer and core were measured. Interfaces of veneer/core specimens were examined with scanning electron microscopy(SEM) and energy dispersive spectrometer (EDS). Results:No statistical difference of initial shear bond strength was shown between two zirconia core brands,and between two veneer layering techniques. Conclusion:Heat-pressed layering technique obtained good veneer/core bond strength as well as conventional powder-liquid layering technique.