The present invention relates to a natural adhesive using garlic and a fabricating method thereof, and, more particularly to a very preservative, adhesive, nonpoisonous and high-performance natural adhesive, which is a chemical-free natural adhesive using garlic with high antibiosis as a major ingredient, capable of efficiently preventing a variety of damages due to volatile organic compounds by employing no chemicals throughout the whole fabricating procedures, and a fabricating method thereof. In detail, the present invention provides a natural adhesive using garlic fabricated by filtering and concentrating an extracted liquid obtained from a mixture of pulverized garlic and water. In addition, the present invention provides a method of fabricating a natural adhesive using garlic, including: (a) preparing and pulverizing garlic; (b) adding a solvent into the pulverized garlic; (c) extracting an extracted liquid from a mixture of the pulverized garlic and water; (d) filtering the extracted liquid; and (e) concentrating the filtered extracted liquid.