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Objective:To do mapping and modeling of conformationalB cell epitope regions of highly conserved and protective regions of three merozoitecandidate vaccine proteins ofPlasmodium vivax(P. vivax) ,ie. merozoite purface protein-1(PvMSP-1), apical membrane antigen -1 domainⅡ(PvAMA1-DⅡ) and regionⅡ of theDuffy binding protein(PvDBPⅡ), and to analyze the immunogenic properties of these predicted epitopes.Methods:3-D structures of amino acid haplotypes fromSriLanka(available inGeneBank) ofPvMSP-119(n=27),PvAMA1-DⅡ(n=21) andPvDBPⅡ(n=33) were modeled.SEPPA, selected as the best online server was used for conformational epitope predictions, while prediction and modeling of protein structure and properties related to immunogenicity was carried out withGeno3D server,SCRATCHProtein Server,NetSurfPServer and standalonesoftware,Genious5.4.4.Results:SEPPA revealed that regions of predicted conformational epitopes formed4 clusters inPvMSP-I19, and3 clusters each inPvAMA1-DⅡ andPvDBPⅡ, all of which displayed a high degree of hydrophilicity, contained solvent exposed residues, displayed high probability of antigenicity and showed positive antigenic propensity values, that indicated high degree of immunogenicity.Conclusions:Findings of this study revealed and confirmed that different parts of the sequences of each of the conserved regions of the three selected potential vaccine candidate antigens ofP. vivax are important with regard to conformational epitope prediction that warrants further laboratory experimental investigations in in vivo animal models.