N-heterocyclic carbene (NHC)-stabilized hydrosilylyne complex Cp*(CO)(2)WSiH((IMe)-I-Me)(2) (3a) ((IMe)-I-Me = 1,3,4,5-tetramethylimidazole-2-ylidene) was formed by the reaction of an NHC-stabilized silylene complex Cp*(CO)(2) (H)WSiH((IMe)-I-Me){C (SiMe3)(3)} (2a) with 1 equiv of (IMe)-I-Me at 70 degrees C. In this reaction, HC(SiMe3)(3) was unexpectedly eliminated from 2a. A C5Me4Et analogue of 3a, (C(3)Me4(E)t)(CO)(2)WSiH((IMe)-I-Me)(2) (3b), was also synthesized by the same method, and the structure of 3b was confirmed by X-ray crystallography. Although the silicon center of 3b is coordinated by two NHCs, the length of the W-Si bond of 3b [2.363(4) angstrom] is as short as that of the shortest W=Si double bond (similar to 2.36 angstrom). These complexes, 3a and 3b, are the first examples of a base-stabilized silylyne complex having only a hydrogen on the silicon atom.