Bartolomeo Giuseppe Antonio Guarneri, del Gesù (; 21 August 1698 – 17 October 1744) was an Italian luthier from the Guarneri family of Cremona. He rivals Antonio Stradivari (1644–1737) with regard to the respect and reverence accorded his instruments, and for many prominent players and collectors his instruments are the most coveted of all. Instruments made by Guarneri are often referred to as Del Gesùs.