Diplomatic relations between Cameroon and Saudi Arabia dates back to a very long period of time. That is to say during the pre - colonial and colonial periods. However, real or official diplomatic relations began in 1966 with the two countries establishment or opening of diplomatic missions or consular service, with resident Ambassadors appointed to each other’s administrative or political capitals. Beginning from that period, Cameroon Saudi Arabia relations has been so beneficial on both side up till date. This study examines the role Islam and hajj in the dynamics of Cameroon - Saudi Arabia relations, which are hajj-driven and how the constant movement of pilgrims to and from Saudi Arabia intensifies the relations between the two states. Islam and Hajj remains the main issues around which Cameroon - Saudi Arabia relations revolve; Saudi Arabia happened to be one of the first states with which Cameroon established diplomatic relations in 1966. Hajj prepared the ground for a link between colonial Cameroon and emergent Saudi Arabia, meanwhile hajj holds a great potential for trade relations between the two countries culminating into enhanced economic diplomacy. This practice originated from hajj being the basis of the first diplomatic mission. The hajj has rubbed positively on the duo relations for enhanced South - South relations and is relevant to the global concern for terrorism, peace and security. The study demonstrates how the role of Islam and hajj in Cameroon - Saudi Arabia relations can opens a new vista in South - South relations. It shows how cultural events involving two or more states can draw them closer diplomatically.