The present invention relates to a water supply device for a flowerpot. The water supply device for a flowerpot includes: a flowerpot including a flowerpot bottom part having at least one drain hole and a flowerpot circumference part protruding from an edge of the flowerpot bottom part a wick support body coupled to the drain hole to protrude toward a space between the flowerpot circumference part, the wick support body having a support body vent hole in an upper end thereof a wick supported by the wick support body to absorb water from a lower portion of the flowerpot bottom part through the drain hole, thereby supplying the water to an upper side of the flowerpot bottom part and a water storage tank storing water, the water storage tank being coupled to a lower portion of a flowerpot to supply the water to the wick. According to the present invention, the wick may be inserted into the flowerpot to increase the amount of water absorbed into soil within the flowerpot.本発明の植木鉢用給水装置は、少なくとも一つの排水孔を有する植木鉢底面部と植木鉢底面部の全周縁で突出形成された植木鉢周壁部とを含む植木鉢と、排水孔に結合され、植木鉢周壁部の間の空間に突出形成され、上端に支持体通気孔を有する芯支持体と、芯支持体により支持されて、排水孔を通じて植木鉢底面部の下部から水を吸収して植木鉢底面部の上部に供給する芯と、水を貯蔵し、植木鉢の下部に結合されて芯に水を供給する貯水筒とを含んで構成され、本発明によれば、芯が植木鉢の内部に進入することによって、植木鉢の内部の土に吸収される水の量を増加させることができる。
