The honor ties Pastrnak with former NHL star Jaromir Jagr for the most consecutive victories.
Pastrnak earned 51 of 52 first-place votes from Czech hockey journalists and coaches, with Chicago Blackhawks rookie Dominik Kubalik coming in second and Philadelphia Flyers forward Jakub Voracek finishing third.
"I want to hold a cup for the world champions and a Stanley Cup above my head," Pastrnak said. "This is a pure individual trophy. I am very honored to have it, it is an inspiration for me. But I don't play golf or tennis, so I won't favor myself before my team."
Jagr, who took home the honor a record 12 times, won four straight from 2005 to 2008. Pastrnak's four wins are tied for third with Vladimir Martinec, and now he trails just Dominik Hasek - who won it five times - and Jagr.
Pastrnak had the best statistical season of his career despite it being cut short due to the COVID-19 pandemic. He recorded a career-high 48 goals and 95 points and won the Maurice Rocket Richard Trophy for the first time.