Kalju Pitksaar (18 May 1931, Tallinn – 26 September 1995, Tallinn) was an Estonian chess player, who won the Estonian Chess Championship.

Pitksaar first participated in the Estonian Chess Championships in 1947, at the age of 16.

[1] In the Estonian Chess Championships, he has won gold (1957) and two silver (1951, 1958) medals.

[4] In 1952, in the Soviet Chess Championships quarterfinal in Krasnodar, he shared 2nd - 3rd place.

[6] In the same year, Pitksaar's chess career was suddenly interrupted - he was disqualified with formulation to "improve his behavior".