The present invention relates to a foldable table mechanism that is convenient to transport. The foldable table mechanism includes table tops and a foldable mechanism. The foldable mechanism includes at least one shelve unit and a plurality of support legs. The support legs include a plurality of movable units. The movable units are pivotably connected. The shelve unit is disposed between the table tops. The shelve unit is movably connected to the movable units. The support legs support and secure the table tops at an open position and are stored between the table tops at a folded position. the present invention is simple in structure, foldable and flexible to use, convenient to carry and transport, thus suitable to use in small space, such as in household setting, small food service areas, and also suitable to use for outdoor activities because it is easy to transport.