Masallacin Arba'a Rukun (Larabci: أربع روكون), wanda aka fi sani da Arba Rucun, masallaci ne a cikin gundumar da ke tsakanin Shangani, Mogadishu, Somalia. Masallacin na daya daga cikin tsoffin wuraren bautar Islama a babban birnin Mogadishu. An gina ta kusan 667 (1260/1 CE), tare da Masallacin Fakr ad-Din. Mihrab din Arba'a Rukun yana dauke da wani rubutu da aka sanya kwanan wata daga shekarar, wanda ake tunawa da marigayin wanda ya assasa masallacin, Khusra ibn Mubarak al-Shirazi (Khusrau ibn Muhammed). Adam, Anita. Benadiri People of Somalia with Particular Reference to the Reer Hamar of Mogadishu. pp. 204–205. AARP, Art and Archaeology Research Papers, Volumes 7-12. 1975. p. 8. Garlake, Peter S. (1966). The Early Islamic Architecture of the East African Coast. Institute. p. 10. ArchNet - Masjid Fakhr al-Din photo of Arba'a Rukun Mosque in 1983