He began his political career in 1980 / 1981 as one of the leaders of the Students' Solidarity; he was governor of the Gdańsk Voivodship from August 1990 to July 1996, and was elected to the Sejm (the lower house of the Polish parliament) in September 1997.
In January 2001, he founded the Civic Platform political party with Donald Tusk and Andrzej Olechowski.
Maciej Płażyński was married to Elżbieta Płażyńska and together they had three children: Jakub, Katarzyna, and Kacper.
Płażyński died in the plane crash[1] which occurred while landing at Smolensk-North airport near Smolensk, Russia, on 10 April 2010.
He received the titles of honorary citizen of Młynary, Puck, Pionki and Lidzbark Warmiński.