She is said to have been involved in a number of key battles with ISIS in northern Syria before she was killed.
A message on the 'We want Freedom for Kurdistan' Facebook page said she was 'martyred in a battle against Daesh'.
Her death has yet to be independently verified while some reports claim she was killed during a clash between the Syrian Democratic Forces (SDF) and the Turkish-backed Syrian opposition.
According to Iran Front Page, Antar was a 'renowned' Kurdish fighter.
The Women's Protection Unit (YPJ) is an all-female branch of the Kurdish People's Protection Units (YPG), who fight ISIS in the Kurdish areas of Iraq and Syria.
The YPG has some 50,000 fighters, 20 per cent of whom are women, and their militia units, which is mainly made up by Kurds, have played a major role in fighting the extremists away from the Turkish border.