Objetive: to evaluate micro-hardness and conversion levels after different postcuring techniques in two types of composite resins. Materials and methods: 36 12mmdiameter 4 mm-height specimens were manufactured with two resins: Flitek z350 and Ena Miscerium. After the manufacturing, specimens were taken to the microduremeter and infrared spectroscopy, and endured four post-polymerization processes: boiling water, microwave, dry heat, autoclave and horno gradia. Results: statistical analyses (by Anova) of two factors with Tukey’s Post Hoc Test by evaluated resin was performed, there appear media and standard deviation, conversion level degrees show a large increase in Ena resin compared to the control group (63.81%) when dry heat post-polymerization is performed (89.02%) and a large decrease when it is performed with boiling water (36.41%). Conclusions: the post-curing process by microwave and autoclave increase micro-hardness level and conversion level, while distilled water at high temperatures diminishes superficial micro-hardness of composite resins.