The present invention relates to an
antimicrobial coating composition comprising, based on the total weight of the
coating composition, 30-60% by weight of a
polyester resin, 3-15% by weight of a curing agent, 0.1-5% by weight of an
antimicrobial agent, 0.1-15% by weight of a
pigment, and the balance being a
solvent. The present invention further relates to an
antimicrobial coated steel sheet comprising a steel sheet and an antimicrobial
coating layer formed on at least one surface of the steel sheet, the antimicrobial coating layer containing an antimicrobial agent in at least a part thereof, the antimicrobial agent having a content ratio Z / (M+Ca) of 0.1-0.5, M being Ca, Ba, Mg, Zn, Ni, Fe or Al, and Z being P, As, V or Si. The antimicrobial coating composition according to the present invention contains an antimicrobial agent. When the composition forms a coating layer, the antimicrobial agent is concentrated on the surface of the coating layer, so that microorganisms adsorbed on the surface of the coating film together with
moisture are effectively killed by
hydroxyl radical species and
hydroxide anions generated on the surface of the coating film. Thus, a coated steel sheet using the antimicrobial coating composition according to the present invention has excellent design properties as well as excellent processability,
chemical resistance, etc.