Bijan Jazani (Persian: بیژن جزنی; 1938, Tehran – April 19, 1975) is a major figure among modern Iranian Socialist intellectuals.
Bijan Jazani was born to Hossien Jazani (حسین جزنی) and Alamtaj Kalantari Nazari (عالمتاج کلانتری نظری). His parent's family began participating in the Tudeh party during a period of political freedom that started from the exile of Reza Shah until the overthrow of Mohammed Mossadegh. The children of these two families became attracted to and then joined the Tudeh youth party. Their activities in the party grew and later gained important responsibilities. His father, who was a military officer, joined the Tudeh party in 1945. Alamtaj Kalantari was a member of the Women's Tudeh party.
In 1947, when Bijan Jazani was 9 years old, his father joined the Democratic Azerbaijan group and in the same year with the fall of sovereign Azerbaijan his father left for the Soviet Union and remained there until 1967. It was for this reason that Alamtaj Kalantari took Bijan Jazani and his sisters to her parent's home.
This period had a major impact in the future political life of Jazani. He lived in a household whose members had a professional role in the Tudeh party. During this time his mother expanded her activities in the women's Tudeh party and Jazani alongside his uncle, who was 2 years older than he was, joined the Tudeh Youth Organization in the year 1948, at the age of 10. After the Tudeh party became illegal on February 4, 1949, Jazani continued participation in the youth party. He was then chosen as the messenger of the youth organization because of his young age and his family background. But the hidden activities of the Tudeh party and the affiliated organizations did not last long and from 1951, the activities slowly became semi-transparent. In addition to this, the leaders of the Tudeh and the youth organization created the "Iranians in favor of Peace", "National Organization in the Struggle against the Anglo-Iranian Oil Corporation", "Democratic Youth Organizations", and the "Student Organization of Tehran". Jazani began his activities in the "Student Organization of Tehran" in 1951–1952 and was responsible for a small group. In 1953 he became semi-responsible for this organization. He was also active in the circulation and sale of student newspapers and began a gym in 1951, which was beneficial to the students of the community and a place for recruiting members in the youth organization.