The accident happened at an apartment complex in the 10600 block of 14th Avenue SW.
Commander Dick Malo with the North Highline Fire Department said a 2-year-old boy was on a couch next to a window on the fifth floor when he fell out of the window. The boy fell onto the fourth-floor balcony below, hitting his head.
The mother, seeing her child fall out the window, jumped out of the window to save him. She also fell onto the fourth-floor balcony and broke her ankle.
Malo said both mother and child were conscious and alert. The child suffered a bruise on his head. Both were transported to Harborview Medical Center for evaluation.