A sleeping straphanger got a rude awakening last month while she was riding on a Brooklyn subway train, according to police.

The 55-year-old woman was asleep on a southbound Q train just after 1 a.m. on Oct. 16 when a man rubbed his private parts on her shoulder, police said. He then fled the train, which was entering the Church Avenue station. 

Police describe the suspect as 45 years old, 5 feet 2 inches tall and 160 pounds. He was last seen wearing a black jacket, blue jeans, dark colored baseball cap, and white and black sneakers.

Anyone with information should call the NYPD’s Crime Stoppers Hotline at 800-577-8477 or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then enter TIP577. All calls are kept confidential.