Jean Daetwyler (24 January 1907, Basel – 4 June 1994, Sierre) was a Swiss composer and musician. He is barely remembered, mostly for his largely forgotten works for alphorn inspired by Josef Molnar beginning in 1970. Also inspired by trombonist Branimir Slokar and other aspects of Swiss culture. Daetwyler was a pupil of Vincent d'Indy at the Paris Conservatoire. He returned to Switzerland in 1933 to teach for over four decades.