Nitras made the announcement in a video message on the X social media platform.
"This week marks the end of my service in the Polish government," he said.
"To everyone I worked with and met along the way—especially the athletes—my deepest thanks and respect. It has been an honour and a great pleasure," he added.
Nitras, a centrist politician, was appointed minister for sport and tourism in December 2023, succeeding conservative Danuta Dmowska-Andrzejuk.
His departure comes amid a broader government reshuffle, the details of which Prime Minister Donald Tusk is expected to announce on Wednesday at 10 a.m.
Sławomir Nitras. Photo: Polish Radio/PR1
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Source: IAR, PAP