The deputies, who were elected to Parliament from the pro-Kurdish Peace and Democracy Party (BDP), had been unable to enter Parliament until the Constitutional Court reached a verdict that their long detentions in prison had been unlawful.
Selma Irmak, Gülser Yıldırım, Faysal Sarıyıldız, Kemal Aktaş and İbrahim Ayhan are the deputies who took their oaths on Tuesday.
Until now, seven of the eight imprisoned deputies had been released from prison.
Previously, Republican People's Party (CHP) deputies Mehmet Haberal and Mustafa Balbay had been released from prison. However, Engin Alan, a deputy from the National Movement Party (MHP) is unable to apply for his release because his conviction has been confirmed by the High Court of Appeals.
The released bdp deputies arrived in Ankara from Diyarbakır on Monday to attend the party assembly meeting. Reportedly, the BDP decided at the conference to conduct a campaign for the release of approximately 300 imprisoned party members in the KCK case. The BDP will make its proposal in a parliamentary sub-committee that was established to investigate the case of the imprisoned deputies.