The Arba'a Rukun Mosque (Arabic: أربع ركون), also known as Arba Rucun, is a mosque in the Shangani medieval district of Mogadishu, Somalia.

[1] The mosque is one of the oldest Islamic places of worship in Mogadishu.

It was built circa 667 (1260/1 CE), concurrently with the Fakr ad-Din Mosque.

Arba'a Rukun's mihrab contains an inscription dated from the same year, which commemorates the name of the mosque's founder, Khusra ibn Mubarak al-Shirazi (Khusrau ibn Muhammed).

This article about a mosque or other Islamic place of worship in Somalia is a stub.