The value of the still life with the title "Nature Morte" (1921) is estimated to be one Million euros.
The Italian Claudia Borgogno has won it in a raffle in Paris-a real Picasso.
Her son, Lorenzo Naso, bought two tickets, worth €100 each, in December, sending one to his mother.
While her son Mr Naso, who works as a European Union's securities markets regulator analyst in Paris, said: 'It was maybe the best decision in my life'. The painting was provided by collector David Nahmad and is the smallest of the 300 Picasso artworks in his possession.
Raffle organizer Peri Cochin, wearing a protective face mask, poses with the painting "Nature Morte, 1921" by Spanish painter Pablo Picasso after the charity raffle official draw to designate the victor of the Picasso oil painting for 100 euros at Christie's auction house in Paris.More news: Spandau Ballet star comes to Singapore man's rescue in radio row
Proceeds will help provide villagers in Cameroon, Madagascar and Morocco with water - a basic need more essential than ever now for people to wash and protect themselves against the global pandemic.
The victor of Wednesday's draw at Christie's auction house in Paris was named as Claudia Borgogno, who was gifted the winning ticket. Naso said he had not realised it was taking place on Wednesday and was not watching the live broadcast.
Over 51,000 people bought the 100-euros ticket through the project's website, raising 5.1 million euros that will go to charity.
The call from organisers to say that his mother had won came as shock.
"When I arrived and I told her she has won she was like, 'Please don't joke, '" he said.More news: In Full 4K UHD on Samsung TV Plus
The painting "Nature morte" by Picasso hangs on a wall at Christie's auction house, Tuesday, May 19, 2020 in Paris. "It was a pretty terrible period for us during this lockdown and now its great news", he said.
Mr Nahmad also gave 100,000 euros ($167,000) to CARE.
The Spanish master's geometric composition representing a piece of newspaper and a glass of absinthe had been valued at one million euros ($1.1 million). Picasso painted it in 1921.
This year, tickets were bought in more than 100 countries, with the majority sold in France, the United States, Switzerland and Italy.
At the first edition of the raffle in 2013, a 25-year-old American won the Picasso drawing The Man in the Opera Hat.More news: 84-year-old alligator rumored to have been Hitler's dies in Moscow