Babban Masallacin Conakry (Faransanci: Grande mosquée de Conakry / Mosquée Fayçal) Wani masallaci ne a Conakry, Guinea, wanda ke gabashin gonar Botanical na Conakry kuma kusa da Asibitin Donka. An gina masallacin ne karkashin Ahmed Sékou Touré tare da tallafi daga Sarki Fahd na Saudi Arabiya. An bude shi a shekarar 1982. Shi ne masallaci na hudu mafi girma a Afirka kuma mafi girma a Yankin Saharar Afirka. Masallacin yana da wurare 2,500 a matakin sama na mata kuma 10,000 a ƙasa ga maza. Arin masu bautar 12,500 za a iya saukar da su a cikin babban jigon masallacin. Lambunan masallacin suna dauke da kabarin Camayanne, gami da kaburburan jarumin kasar Samori Ture, Sékou Touré da Alfa Yaya. Masallacin na fama da rashin kulawa, ruwan famfo da wutar lantarki, duk da dimbin gudummawar (GNF) biliyan 20 da masarautar Saudiyya ta yi a 2003. A ranar Juma'a 2 ga Oktoba 2009 aka ajiye gawarwakin mutane 58 da aka kashe a 28 ga Satumba a cikin shirin kai harin a gaban masallacin. Babban taron makoki da masu zanga-zanga sun kasance, wanda ya haifar da artabu da 'yan sanda.