In the Congo Basin, the economic, social and environmental value of non timber forest products (NTFPs), such as bush mango (Irvingia gabonensis) is widely acknowledged. However, knowledge of the volumes traded, extent and distribution of revenues along the value chain is limited while little is known about the chain's sustainability. The survey of the value chain was followed by field observations and semistructured interviews with 174 stakeholders in Estuaire, Nyanga and Ngounié provinces of Gabon. Women dominate in the bush mango value chain. Most bush mango sold in urban and rural markets came from neighbouring countries. There is skewed distribution of revenues, with traders and processors earning higher incomes than harvesters. Deforestation, lack of harvesting standards and poor management of resources, according to the stakeholders, represent the main factors threatening the sustainability of the chain. Long-term socio-economic and environmental sustainability of the chain calls for raising the political visibility of the chain, training and collective action.