Marta Michna (née Zielińska; born 30 January 1978) is a Polish-born chess player who won the Polish Women's Chess Championship in 2003.

In the Polish Women's Chess Championship's finals Marta Michna won six medals: gold (2003), silver (2002) and 4 bronze (1994, 1996, 1998, 2000).

[1] In 2000s Marta Michna participated in Women's World Chess Championship by knock-out system: Marta Michna played for Poland and Germany in Women's Chess Olympiads:[5] Marta Michna played for Poland and Germany in European Team Chess Championship:[6] At the end of the 1990s Marta had a relationship with Alexei Shirov, with whom she has a daughter Masza.

In 2006, she married FIDE Master (FM) Christian Michna (born 1972)[7] and since 2007 in the international arena represented Germany.

[8] She lives in Hamburg and has four children - Masza, Mateusz, Milosz and Maja.