Barbara Bieganowska-Zając (née Niewiedział born 1 September 1981) is a Paralympian athlete from Poland competing mainly in category T20 sprint and middle-distance events.

She followed this with a gold medal in the 800 metres at the 2000 Summer Paralympics in Sydney, beating her team-mate and long-time rival Arleta Meloch into second place.

After Sydney Niewidzial's career as an athlete was halted due to her classification being suspended by the International Paralympic Committee (IPC) following the cheating scandal at the 2000 Games.

[2] Niewiedział had planned to retire after the London Paralympics, but the experience of competing in front of a cheering capacity crowd that the 2012 Games provided changed her decision.

[1] In the build up to the 2016 Summer Paralympics, Niewiedział travelled to Italy to take part in the 2016 IPC Athletics European Championships in Grosseto.