Kazimierz Mariusz Kleina (born February 21, 1958 in Sierakowice) is a Polish politician.
He was elected to the Sejm on September 25, 2005, getting 7896 votes in the 26th Gdynia district, as a candidate from the Civic Platform list.
He was also a member of the Senate 1997-2001 and has been a member since 2007.Kazimierz Kleina was born in Sierakowice, Pomeranian Voivodeship, Kashubia.
He graduated from the University of Gdansk with a degree in transport economics.