The Kenya Red Cross said rescuers pulled out a one-year old girl from the rubble of a building on Tuesday morning in Nairobi, more than 72 hours after it collapsed following heavy rain.
Red Cross spokeswoman, Arnolda Shiundu, said the rescued baby was severely dehydrated.
She said the baby was receiving medical attention at Kenyatta National Hospital.
Meanwhile, officials have put the death toll so far at 21.
Aid workers had on Monday said chances of finding more survivors was unlikely after the building fell down on Friday night.