A 9-year-old girl is fighting for her life after her mother stabbed her four times with a chef’s knife this morning in Queens, authorities said.

The woman stabbed the child in her head, shoulder and back inside a home on 176th Street near 145th Avenue in Springfield Gardens where they’d gone for a playdate, said police.

Emergency responders rushed the little girl to Jamaica Hospital, where she underwent surgery this afternoon.

Police sources gave the girl’s name as Briani Davis. The mother’s name was not released.

Cops took the child’s mother into custody, and drove her to the 105th Precinct in Queens Village. Later, the mother was wheeled out of the precinct on a gurney and taken to a hospital.

The stabbing was witnessed by a man in the 176th Street home, who called 911 and held the mother until police arrived, said Police Commissioner Ray Kelly.

Emergency responders desperately tried to save the stabbed girl. “Hurry up — it’s a baby, it’s a baby,” one yelled, according to neighbor Lindsay Fortune.

“When they brought her out she was wrapped in a bloody sheet,” Fortune said. “Her arms were flailing. She was alive but not too coherent. She was kind of wobbly, like she was trying to rock back and forth.”

The girl was rushed to Jamaica Hospital, where she was listed in critical but stable condition.

Katana Daniels, another neighbor, watched as a woman from the girl’s home was placed in custody.

“She had her head laid back and looked like she was yelling,” Daniels said. “She looked insane. She didn’t look right. She looked like something went wrong mentally.”