Giachem Guidon (born 4 September 1961 in Bever) is a Swiss cross-country skier who competed from 1982 to 1994. Competing in four Winter Olympics, he earned his best career finish of fourth in the 4 × 10 km relay at Calgary in 1988 and his best individual finish of 12th in the 15 km event at Sarajevo in 1984.