In this study, finishing and polishing of composite restorations were done. The teeth were stored in distilled water at 37oC for 24 hours before testing.Each specimen was then sectioned in a mesio-distal direction into 2 equal halves and each half was poured in acrylic resin block. Then, Vickers hardness number (VHN) was determined on the top, middle and the bottom surfaces (0.1, 2 from occlusal surface and 0.1 mm from gingival wall) using Digital Display Vickers Micro-hardness Tester. Three Way ANOVA was used to study the effect of different Curing Direction, Curing time and Cavity Width followed by Tukay’s post-hoc test for pairwise comparison when ANOVA is significant. The result of current study showed that the tested bulk-fill resin composite (X-tra fil) achieved at least 80% depth of cure value at the manufacturer's claimed maximum increment thickness of (4mm) with irradiation times stated by the manufacturer (10 seconds). Regarding the curing direction, the result of current study revealed a non-significant difference in depth of cure between occlusal, transtooth and occlusal/transtooth curing in moderate width cavities. While for wide cavities, the highest depth of cure was obtained by occlusal and transtooth curing compared with occlusal curing alone. The top, middle and bottom microhardness also showed a non-significant difference between curing directions except for top microhardness for moderate cavities with 10s curing, where occlusal curing showed significantly higher value