Artem Serhiyovych Udachyn (Ukrainian: Артем Сергійович Удачин; born March 26, 1980 in Mariupol, Donetsk Oblast) is a male weightlifter from Ukraine. He twice competed for his native country at the Summer Olympics (2000 and 2008) in the men's super heavyweight division (+ 105 kg), finishing in 11th and 4th place in the final standings.