Three stagehands at a Broadway theater were injured when a piece of rigging equipment fell on them Thursday — severing part of one man’s ear and fracturing another’s skull, authorities said.

At least one of the workers from the play “Hillary and Clinton” was struck in the head when the pipe plummeted 30 feet around 11:12 a.m. at the John Golden Theatre on 45th Street off Eighth Avenue, the FDNY said.

A 51-year-old man got part of his ear cut off in the incident and was rushed to Bellevue Hospital, the NYPD said.

Another victim, a 46-year-old man, had a possible broken left arm and neck and back trauma and was also taken to Bellevue.

The third stagehand suffered a fractured skull and cuts and was taken to New York Hospital Weill Cornell.

The trio were working on the play “Hillary and Clinton,” starring Laurie Metcalf and John Lithgow, which finished its run Sunday.

The “three stagehands at the Golden Theatre sustained injuries when a piece of rigging equipment fell from the grid above the fly floor where they were working,” said The Schubert Organization, which runs the 92-year-old theater.

“The Shubert Organization will continue to monitor the situation,” the statement said.