Major General Manoonkrit Roopkachorn is a former Thai military officer, senator and President of the Senate of Thailand. A leader of the "Young Turks" clique of military officers, he took part in the coups of 1976 and 1977, in the unsuccessful coups of 1981 and 1985, and in the 2002 corruption case of Prime Minister Thaksin Shinawatra.

The 1985 Thai military coup attempt was a military coup attempt against the government of Prem Tinsulanonda, by former Thai military leaders on 9 September 1985, but a counter-coup by Prem government in the morning led to surrender of the coup forces.