Abstract: A rotary table includes a first plank which has a plurality of fastening portions and a plurality of rolling balls corresponding to fastening portions, and each fastening portion fastens each rolling ball to one side of the first plank, and a second plank which has a first baseboard, a second baseboard, an annular trough and at least one latch portion. The first baseboard and second baseboard have respectively a first trough and a second trough on one side thereof that are joined through the latch portion to form the second plank with the annular trough in a continuous manner at the same plane. The first plank is turnable relative to the second plank through the rolling balls moving in the annular trough.