An enraged mom tossed her infant son 10 feet down a flight of steps during a nasty fight with her husband Saturday afternoon in Queens, police said.

The woman, Hoque Sadika, 23, furious that her 31-year-old husband, Erfanul Sadika, allegedly violated an order of protection, called 911 around 12:50 p.m. to report that he showed up at her Jamaica home on 90th Avenue, cops said.

As she waited for police to arrive, she threw the 4-month-old baby — still strapped in a stroller — down the steps, according to police.

The baby suffered a contusion on his head and was taken to Long Island Jewish Hospital in stable condition.

The mother was charged with assault; the father with violating an order of protection.

The infant was removed from his parents’ care, authorities added.

Additional reporting by Larry Celona and Amanda Woods