A drunken, pipe-wielding monster viciously beat and raped a woman in Queens last night, cops said.

The victim, who is in her 20s, was walking on 41st Road near Main Street in busy Downtown Flushing when the pervert, a stranger, dragged her into an alley and beat her at 9 p.m., police sources said.

A witnesses spotted the man fighting with the woman and called 911.

Officers arrived in time to pick up the bloodied and drunken suspect as he walked away from the crime scene, according to authorities.

The victim was rushed to New York Hospital Queens in critical condition.

Cops were questioning the 27-year-old suspect at the 109th Precinct station house.