الحزب الاشتراكي اليمني
Haidar Abu Bakr al-Attas (; born April 5, 1939) was appointed Prime Minister of Yemen by President Ali Abdullah Saleh when the People's Democratic Republic of Yemen and Yemen Arab Republic united in 1990 to form present-day Yemen. Al-Attas served until 1994. He is a member of the Yemeni Socialist Party.