He attained the court rank of shō ni-i (正二位) and sadaijin, and posthumously ju ichi-i (従一位).

Mononobe no Maro first appears in historical documents at the conclusion of the Jinshin War of 672, on the side of Prince Ōtomo.

[2] At the funeral service of Emperor Tenmu, Maro spoke a condolence message as a representative of the ministry of justice.

In 689, Maro was dispatched with Ishikawa no Mushina (石川虫名) to Tsukushi Province to deliver court rank diplomas.

[3] Later that year, Tajihi no Shima [ja] died, and Maro went with Prince Osakabe to deliver a gift from the Emperor to his house.

Two months later, Maro was promoted to the long-vacant position of sadaijin, and Fuhito filled his vacancy as udaijin.

Empress Genshō lamented his loss deeply, sending Prince Nagaya and Tajihi no Miyakemaro (多治比三宅麻呂) on a condolence call to his home and granting him the posthumous rank of ju ichi-i (従一位).