Objective: The aim of this study was to measure the fracture resistance and marginal accuracy of three unit zirconia bridge frameworks sintered by two different techniques (Conventional sintering technique and Microwave sintering technique). Materials and Methods: Ten samples were used and divided into two groups, each group consisted of five zirconia frameworks milled using CAD/CAM milling technique. The first group was sintered using a conventional sintering furnace, while the second group was sintered by microwave sintering furnace. Each group was evaluated for marginal accuracy using digital microscope at 40X magnification at different points on all aspects. Fracture resistance test was then applied to both groups using a Universal Testing Machine. Finally some samples were scanned using Scanning Electron Microscope at different magnifications. Data were collected, tabulated and statistically analyzed. Results: the t-test analysis showed that microwave sintering technique had better marginal accuracy but with non-significant difference than conventional sintering technique. It also showed slight difference in favor of microwave sintering but also with non-significant difference than conventional sintering as regarding the fracture resistance test. Conclusions: It was found that microwave sintered frameworks showed more uniform grains, finer grain size with more dense structure that is less in voids and with regular grain boundaries. While, conventional sintered frameworks showed less uniform grains, and different sizes of grain, more voids and less dense structure.