Péladeau was born in Montreal on April 11, 1925 as the youngest of seven children of Henri Péladeau,who had a successful timber business. Whilst on a sales trip to Europe in 1929, the stock market crashed and on his fathers return to Montreal he found that his two partners had taken control of the business.This event undoubtedly affected Pierre Peladeau's attitude to business and his business partners.
Péladeau had four children, Erik, Isabelle, Pierre Karl, and Anne-Marie, with his first wife, Raymonde Chopin, who died in 1976. Pierre Karl Péladeau would serve as CEO of Quebecor before serving one year as leader of the Parti Québécois from May 2015 to May 2016. Érik Péladeau served as a former Vice-Chairman of Quebecor Inc. He had two children, Simon-Pierre and Esther with his second wife, Line Parisien, whom he divorced and regretted it. Péladeau had a relationship with Manon Blanchette that produced one son and he ended his life with his long term partner, Anne Béland. 
Péladeau's time spent with Quebecor meant that he was often an absent father to his children.
In 1987 Péladeau told The Globe and Mail that "I've had all the women I wanted, when I wanted them." Péladeau also openly boasted that he only spoke English when he could make a profit by doing so.
In 1989, Péladeau said that women who wore hats had no place on corporate boards because "they seduce too much." In 1990, Péladeau was quoted in l'Actualite magazine saying that Jews "take up too much space'" in Quebec, and was forced to issue a statement of apology claiming that he meant it in the context of Jewish fashion designers getting the lion's share of coverage from Montreal newspapers.
Education and career
He attended College Jean-de-Brebeuf (a private school also attended by Pierre Elliott Trudeau). He then went on to complete a degree in philosophy at the Université de Montréal, and a law degree at McGill University.
While studying for the bar exam in 1950, Péladeau purchased a struggling community paper, Le Journal de Rosemont, including their printing works, with a $1,500 loan from his mother, Elmire,which became "Nouvelles et Potins" .
In 1977, Péladeau expanded Quebecor into the United States by starting a daily sports-heavy tabloid called The Philadelphia Journal, which was unsuccessful and ended its publication run in 1981. Péladeau later spoke of his failed venture and the loss of his 14 million USD investment as "the most expensive M.B.A. in the United States." Péladeau also went on to acquire printing businesses in France and the United Kingdom, printing "Paris Match" amongst many other well known publications both in Europe and the USA.
Death and honours
Péladeau suffered a heart attack on December 2, 1997, and fell into a coma. On December 24, Péladeau died at Hotel-Dieu Hospital in Montreal at the age of 72. A private memorial ceremony for Péladeau was planned for December 29 in Sainte Adele's Pavilion des Arts.
At the time of his death, Quebecor had 6.3 billion CAD in revenue and Le Journal de Montreal was the Canadian newspaper with the third largest circulation as well as the largest French newspaper in Quebec Quebecor Printing was North America's second-largest commercial printer. Péladeau left the company to his heirs, and his son, Pierre Karl Péladeau would become president and CEO in 1999.
In 1999, Quebecor established an annual bursary for young Quebec entrepreneurs award in his name.
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- "Sister of Quebec media mogul Pierre Karl Péladeau killed in car crash". www.cbc.ca. Retrieved 2016-05-04.
- MacDonald, L. Ian (May 3, 2016). "How one TV interview by his ex killed Péladeau's political career". iPolitics.ca. Retrieved May 4, 2016.
- "Five things to know about Quebecor". Winnipeg Free Press. The Canadian Press. May 3, 2016. Retrieved May 4, 2016.
- "Quebecor | Pierre-Péladeau Bursaries". www.quebecor.com. Retrieved 2016-05-04.