Jędrzej Gruszczyński (born 13 November 1997) is a Polish professional volleyball player who plays as a libero for Projekt Warsaw.

On 12 April 2015, the Poland national team, including Gruszczyński, won a title of the U19 European Champions.

[3][4] He took part in the 2015 European Youth Olympic Festival, and on 1 August 2015 achieved a gold medal after the final match with Bulgaria (3–0).

[5] On 2 July 2017, Poland, including Gruszczyński, achieved a title of the U21 World Champions after beating Cuba in the final (3–0).

[6][7] His national team won 47 matches in the row and never lost.