Abstract: Novel organosilicon compounds containing a mercapto group are provided, which compounds are of the following general formula, HSCH.sub.2 C.sub.6 H.sub.4 (CH.sub.2).sub.n Si(CH.sub.3).sub.3-m (OR).sub.m, wherein R represents a methyl group or an ethyl group, n is a value of 0,1 or 2, and m is a value or 1, 2 or 3. the ocmpounds are substantially free of any offensive odor derived from the mercapto group and are useful as a silane coupling or crosslinking agent.