A subway perv who allegedly masturbated in front of a woman aboard a Queens train was arrested last week, police announced Wednesday.

Fnu Kamruzzaman, 30, allegedly touched himself on a northbound E train as it was arriving at the Court Square subway station on Jan. 5, authorities said.

The woman had snapped a photo of the sicko and reported him to police.

Kamruzzaman was charged with public lewdness.

The incident from earlier this month is not the first time Kamruzzaman has been accused of a sex crime on the subway in Queens.

In August 2017, he was charged with forcible touching and sex abuse for allegedly exposing himself and rubbing his genitals on a 36-year-old off-duty female cop on the 7 train in Sunnyside.