The aim of this research is to see the effect of various dentin conditioners (phosphoric acid) to the bond strength between resin adhesive HNPM/TEGDMA (2 Hydroxy-3,2-Napthoxy-Propyl Methacrylate/Trietilen Glokol di Methacrylate) and dentin tissue of bovine teeth. Dentin conditioner that was used are phosphoric acid solution 10% 25%, 35% (Group A₁, A₂, A₃). Specimens was divided into 3 groups, each group has 10 specimens. Bond strength test used "Universal Testing Machine" AG 5000 and SHIMADZU type. The result of this research shows average differences of bond strength of each group. Anova test there is a significant difference (8.545 and p<0.05). Double comparison Tukey test among groups genereally are significant different (p<0.05) except between A₂ and A₃ group. The result of the research stated there are effects of various dentin conditioners to the bond strength between resin adhesive HNPM/TEGDMA and dentin tissue.