In the present study, analysis of in vitro inflammatory showed whole plant of Rhizophora mucronata Lam. (Malpighiales: Rhizophoraceae) can be the potent source. The data from this study showed that the R. mucronata leaf, bark and root extract could serve as an important anti-inflammatory agent. Moreover, among the three extracts, the stilt root and leaves extract showed highest anti inflammatory. In vitro antiinflammatory activity of the selected plant extracts was evaluated using albumin denaturation, membrane stabilization and proteinase inhibitory assays. As part of the investigation on the mechanism of the anti-inflammation activity, ability of extract protein denaturation was studied. Maximum inhibition (296.26%) was observed from root extract followed by bark (259.48%) and leaf (237.62%). The extracts inhibited the heat induced hemolysis of RBCs to varying degree as show in table below. The maximum inhibition 284.17% was observed from bark extract followed by root (265.05%) and leaf (232.61%). It reveals that these phytochemical constituents are responsible to maximum protection of protein denaturation, albumin denaturation and membrane stabilization assay. The future work will be determination of anti-inflammatory and antiarthritic activities by in vivo models.