Janusz Bogdan Kupcewicz (born 9 December 1955 in Gdansk) is a retired Polish football player, who played as a midfielder.
He played for clubs such as Stomil Olsztyn, Arka Gdynia, Lech Poznan, AS Saint-Etienne, Larissa, Lechia Gdansk and Adanaspor.
He also was loaned to Zonguldakspor in 1986–87 season.
He played for Polish national team, for which he played 19 matches and scored 5 goals.
He was a participant at the 1978 FIFA World Cup and 1982 FIFA World Cup, where Poland won the third place.