Mainbocher is a fashion label founded by the American couturier Main Rousseau Bocher (1890-1976), also known as Mainbocher. Established in 1929, the house of Mainbocher successfully operated in Paris (1929-1939) and then in New York (1940-1971). Although often pronounced "Man-bo-shay," the designer's name is correctly pronounced "Maine-Bocker."

In November 1929, Main Bocher fused his own name, in honor of his favorite couturiers, Augustabernard and Louiseboulanger, and established his own fashion house, incorporated as "Mainbocher Couture," at 12 Avenue George V in Paris. In 1940, Main Bocher relocated his business to New York on 57th Street next to Tiffany's and established "Mainbocher Inc." As a French-American designer of international reputation, Mainbocher returned to New York with wide publicity, the first American celebrity in the French fashion world。In 2002, Mainbocher was honored with a bronze plaque on New York City's Fashion Walk of Fame in the legendary garment district.