PURPOSE: A natural antibacterial agent prepared by mixing phytoncide, thymol, or spearmint is provided to maximize antibacterial ability and to ensure sustained release properties. CONSTITUTION: A natural antibacterial agent contains 70-96 wt% of phytoncide and 4-30 wt% of thymol. The antibacterial agent also contains 4-30 wt% of spearmint and 70-96 wt% of phytoncide. The phytoncide is isolated from Korean pine cones. The natural antibacterial agent is manufactured in the form of a film, emulsion, wettable powder, particles, suspension, powder, fine particles, capsules, beads, fumigant, or fog agent. An apparatus for extracting essential oils comprises a distillation tank(1), a cooling device(2), a oil/water separation device(3), and a steam generator(4).잣나무 구과에서 추출한 피톤치드와 티몰 또는 스피아민트를 혼합하여 제조한 천연 항균제 및 이를 이용한 과실의 병해 방재 소재.