Maria Malyjasiak is a Polish Judoka, submission grappler and Brazilian jiu-jitsu (BJJ) black belt[a] competitor.

A former Poland National Judo Team and Poland National Grappling Team member, Malyjasiak is a BJJ black belt Pan-American (gi and no-gi) Champion, European Open Champion and a World IBJJF and ADCC Submission Fighting World Championship medallist.

[5] In 2011 she won a Brazilian jiu-jitsu (BJJ) tournament, the UAEJJF Abu Dhabi Pro Trials, with only two months of training.

[5] Malyjasiak competed at Fight 2 Win 154 on October 17, 2020 and won the promotion's welterweight gi title by defeating Nathiely de Jesus.

[8] Malyjasiak returned against ADCC world champion Hannette Staack at Fight 2 Win 168 on March 27, 2021 and defeated her by decision.

[10] Malyjasiak competed in the IBJJF European Championship 2023 where she won gold at medium-heavyweight and a bronze medal in the absolute division.