The present invention relates to an air defoamation device for a substrate. The air defoamation device for a substrate according to the present invention is provided to prevent the formation of an air trap caused by the inflow of air into a via hole formed on the substrate by vibrating the substrate by hitting or interfering a jig which is installed on an inlet of a treatment tank where the substrate is dipped and which clamps the substrate; to facilitate the optimization of processes by removing air remaining in the via hole; and to improve the reliability by solving a quality failure problem related to a task of coating the substrate based on the optimization.
