Armuji or Armudji (born 8 June 1965) is an Indonesian politician, member of the Indonesian Democratic Party of Struggle who is serving as vice mayor of Surabaya alongside mayor Eri Cahyadi, who won the 2020 Surabaya mayoral election against former police inspector general Machfud Arifin.

The pair is collectively called Erji.

[1] Armuji previously served as a member, vice speaker, then speaker of the Surabaya House of Representatives before being elected into the East Java Regional House of Representatives in 2019.

Before that, Armuji also served as the head of the Athletic Association of Indonesia.