A woman set three small blazes inside a Midtown hotel on Tuesday, authorities said.

The suspect lit a fire inside a room of the Staybridge Suites at 340 W. 40th Street at 11:40 a.m. — she then set two more blazes in trash cans on two separate floors, police said.

No one was injured and the firebug was last spotted headed east on 40th Street.

She’s described as about 5 feet 7 inches tall and weighing 180 pounds.

She wore her hair in a ponytail and donned a black shirt, black pants and black shoes while fleeing.