A Queens middle school student tried to show pals her pepper spray at lunch—and accidentally sprayed the cafeteria, authorities said.

The 11-year-old girl released the spray about 11:15 a.m. at J.H.S. 226 on Rockaway Boulevard, near 116th Avenue, cops said.

She will not face any charges.

Thirty-four students suffered minor injuries, but were treated by a doctor at the scene, authorities added.

All of their families were contacted after the bizarre incident, according to a DOE spokeswoman.