Turkish main opposition Republican People's Party (CHP) dismissed Öztürk Yılmaz, a lawmaker from eastern Ardahan province.
Yılmaz was dismissed on Tuesday for violating the party bylaw by appearing on television without permission.
His case had been referred to the party's disciplinary committee.
In a recent appearance, Yılmaz suggested that the Muslim call to prayer, or adhan, should be changed from Arabic to Turkish.
His remarks were slammed by the party administration as well as CHP lawmakers.
From 1932 to 1950, in Turkey's single-party era of CHP rule, the adhan was recited in Turkish, but then-Prime Minister Adnan Menderes ended the practice in 1950.
Following the party decision, Yılmaz held a news conference in the parliament describing the move "as a betrayal".
"I see it [the decision] as an injustice by a party which is in search of justice and law," he said.
He added that the Turkish nation would judge the party decision.
