Fujiwara no Muchimaro (藤原 武智麻呂, 680 – August 29, 737) was a Japanese courtier (kuge) and politician of the late Asuka and early Nara period.

When Fuhito, Muchimaro's father, died in 720, Prince Nagaya was at the highest rank in the state government.

Prince Nagaya was a grandson of Emperor Tenmu, but not a son of Fujiwara family, therefore was seen as a threat by Muchimaro and his three brothers.

He was the oldest son of the Head of the Council of State Fuhito, and his mother was a daughter of the Soga Great Minister of the Treasury.

He was born in the mansion at Ōhara on the fifteenth day of the fourth month of 680, the ninth year since the enthronement of the sovereign Tenmu.