Tris(trimethylsilyl)cyanurate, C12H27N3O3Si3 (1), has been synthesized and characterized by elemental analysis, IR, Raman, 13C and 29Si NMR, and thermogravimetric methods. The molecular and crystal structure has been determined by single crystal X-ray diffraction. This compound crystallized in space group P63/m (176), Z = 2 with a = 11.017(2), b = 11.017(2), c = 9.676(3) ; = 90, = 90, = 120. The geometry of the molecule is compared with tris(trimethylsilyl)cyamelurate.