A window washer working without a harness died when he plummeted more than four stories after slipping from a building ledge in Manhattan, officials and sources said.

Anthony Ventura, 29, lost his footing while standing on the outside ledge of a Park Avenue building between 25th and 26th streets at around 11:40 a.m. and landed on the concrete below, sources said.

He was rushed to Bellevue Hospital in cardiac arrest and later died.

Police sources said Ventura had a harness but was not wearing it when he fell.