The incident occurred at the busy Padma Junction here at 6.30 pm on Saturday.
The 46-year-old man, who was injured seriously in the fall, was taken to the general hospital here after the woman, Ranjini, noticed his plight and pleaded for help from passers-by to save his life.
CCTV footage telecast by various television channels today showed the man falling from the third floor where he had been reportedly staying for quite some time.
"The man was severely injured. He was bleeding but still breathing. So I did not think twice. I along with my daughter pleaded for help from people to take him to hospital at the earliest," she said.
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The man, a native of Thriprayar in Thrissur district, was rushed to the general hospital at Ernakulam. He was later shifted to the government medical college hospital at Kottayam, for better medical care, hospital sources said.
Malayalam film actor Jayasuriya thanked the woman for persuading people to take the injured man to hospital.