Jules Bernard Montenier (March 23, 1895 – August 20, 1962), of Chicago, Illinois, was an inventor and a cosmetic chemist.
He was also the founder of Jules Montenier, Inc., a cosmetics company.
He was famous for inventing Stopette, an anti-perspirant that was a longtime sponsor of the CBS game show What's My Line? Stopette's slogan, repeated at the beginning of the episodes Montenier's company sponsored, was "Poof! There goes perspiration." Montenier was described in the introduction segment of What's My Line? as the "famous cosmetic chemist."