Lactic acid bacteria (LAB) occur naturally in several raw materials like milk, meat and flour used to produce foods. Bacteriocin is proteinaceous antibacterial compounds, which constitute a heterologous subgroup of ribosomal synthesized antimicrobial peptides. Bacteriocin can be used as bio preservatives in fermented foods. The strains of lactic acid bacteria have also potential to act as a biopreservative or natural food preservative.