Thanassis "Sakis" Moustakidis (Greek: Θανάσης "Σάκης" Μουστακίδης, born ) is a former Greek male volleyball player and a volleyball coach. He was part of the Greece men's national volleyball team that won the bronze medal at the 1987 European Championship in Belgium. He played for Olympiacos for 9 years (1987–1996), winning numerous titles.