A table furniture mainly comprises a table plate, four leg units mounted at four end corners of the table plate, two couplers and a central beam. Each leg unit has a leg rod and a side bracket connected with the leg rod, an engaging portion being provided at its free end. The coupler has at least three insertion slots with shrunk openings among which two opposing insertion slots are for engagement with the engaging portions of both adjacent leg units. The central beam also has an engaging portion provided at each end for engagement with one insertion slot of the couplers adjacent to the two opposing insertion slots. In this manner, the structure can facilitate assembling and disassembling of the whole table.