Marcel Adamczyk (5 January 1935 – 10 February 2023) was a French footballer who played as a defender.
He then left to play for Metz but refused his professional contract and returned to Giraumont.
He was also selected to play in a match for the France national B team against Italy.
With Nancy, he reached the final of the 1961–62 Coupe de France, which resulted in a 1–0 loss to Saint-Étienne.
That year, he played in his only match for the France national team against Bulgaria in Sofia.