An MTA custodian was busted for swiping a pair of Beats headphones from a snoozing straphanger on a Manhattan train early Friday, cops said.

Juan Irizarry, 30, was sweeping the Brooklyn Bridge-City Hall Station around 3:30 a.m. when he walked into a stalled northbound 6 train and grabbed the headphones from the pocket of a 30-year-old man who was asleep, police said.

He was busted at the scene and charged with grand larceny, as well as criminal possession of a controlled substance. It was not immediately clear what drug Irizarry was allegedly carrying.

“These are very disturbing allegations and we will conduct a full investigation in cooperation with the NYPD,” MTA spokesman Shams Tarek said in a statement.

Irizarry, who has worked with the MTA since July 2016, will be suspended without pay immediately — pending the outcome of the investigation, the agency said.