A 65-year-old woman jumped from an Upper East Side apartment building in an apparent suicide attempt Tuesday — only to land on scaffolding outside the building, police said.

The unidentified jumper leaped from an eighth-floor apartment at East End Avenue between East 81st and 82nd streets around 8 a.m. and landed on scaffolding between the third and fourth floors.

The woman was taken to New York-Presbyterian/Weill Cornell Medical Center in critical condition, cops said.