Talk about a real pane.

A diner was struck by falling glass this afternoon outside of a trendy Midtown restaurant.

The 50-year-old victim was leaving Marea’s on Central Park South around 3:20 p.m. when glass fell from a window above, sources said.

He was treated for a gash on his head at New York Hospital.

The hotspot Italian eatery boasts 150 seats and is owned by Chris Cannon and chef/partner Michael White.