We synthesized peptide-resin conjugates (1 and 2) by immobilizing ${eta}$-sheet antibacterial peptide and ${alpha}$ helical antibacterial peptide on PEG-PS resin, respectively. Conjugate 1 showed considerable antibacterial activity in various conditions, whereas conjugate 2 did not exhibit antibacterial activity. The growths of various bacteria were inhibited by conjugate 1 even at lower concentrations than MIC. Conjugate 1 killed bacteria at MIC and had a potent synergistic effect with current antibacterial agents such as vancomycin and tetracycline, respectively. Overall results indicate that polymer surface modification using antibacterial ${eta}$ sheet peptide is a powerful way to prevent microbial contamination on polymer surfaces.