Two women — one wearing just a yellow bra as a top — knifed two men in separate subway attacks in Manhattan Tuesday, police said.

In the first stabbing, Danzena Moore, 26, knifed a 27-year-old man in the stomach at about 4:35 a.m. in the mezzanine of the Union Square station, cops said.

Moore was arrested at the scene and charged with felony assault.

The victim was rushed to Bellevue Hospital, where he was listed in stable condition.

At about 1:10 p.m., a woman sporting no shirt and a yellow bra stabbed a man in the stomach aboard a downtown 4 train, police sources said.

The attacker, who sources say is a transgender women, took off when the train stopped at Grand Central station.

That victim, too, was taken to Bellevue and is expected to survive.