The man who allegedly stabbed his estranged wife multiple times in a Brooklyn subway station Friday afternoon is in custody, police said.

The 22-year-old woman was riding an escalator at the Brighton Beach stop on the Q line at 1:50 p.m., when Ravshan Saibnazarova, 30, came up behind her and repeatedly plunged a kitchen knife into her torso, cops said.

The victim was rushed to Lutheran Hospital, where she is listed in stable condition.

Saibnazarova ran off before emergency responders arrived, but was nabbed Saturday afternoon, authorities said.

Saibnazarova, whose wife had an active restraining order against him, was charged with assault.