Abstract: A foldable table includes a tabletop and a table supporting frame substantially supporting the tabletop thereon. The tabletop has an upper utilizing portion which has a top resting edge peripherally encircling therearound, and a bottom bottom supporting surface for the table supporting frame to be mounted thereon. The tabletop further has an engaging rim downwardly protruded from the bottom supporting surface to form an outer edge thereof and to define a storage cavity within said engaging rim, wherein said engaging rim has an engaging edge groove formed thereon which is shaped and sized to fittedly receive said top resting edge. Whereby, one foldable table is capable of securely stacking on another foldable table by making the top resting edge of the lower foldable table to receive in the engaging edge groove of the upper foldable table.