The aim of this study is to comparative evaluate the remineralization potential of various newer remineralizing agents such as Fluoride enriched Casein Phospho-peptide Amorphous calcium phosphate, Beta Tri-calcium Phosphate and Hydroxyapatite based cream on bleached enamel surface using Surface hardness test. 40 freshly extracted intact human premolars extracted for orthodontic purpose were used to prepare 75 enamel sections from the buccal and palatal surfaces of t`he teeth. The teeth were divided into 5 groups of 15 specimens and subjected to surface treatment as follows: Grp 1: Intact tooth (Control group) -No Surface treatment, Grp 2: Bleaching with 35% Hydrogen peroxide (Pola-office), Group 3: CPP-ACPF (GC Tooth Mousse plus, GC Corp) for two applications, 4 mins each for 14 days, Group 4: β-TCP (3M ESPE ClinPro) for 4 min for 14 days, Group 5: Hydroxyapatite based cream (ReminPro, VOCO) for 30 minutes for 10 days. All the specimens were stored in artificial saliva in the intervals and throughout the study. The specimens were subjected to qualitative and quantitative evaluation using Surface Hardness test for Vickers Hardness Number. Enamel specimens treated with bleaching agent (Pola Office) showed a decrease in microhardness which was statistically significant when compared with unbleached enamel [Grp1]. Among the remineralising agents tested in the study Hydroxyapatite based cream was found to be marginally more effective then the CPP-ACPF and β-TCP which was not statistically different.