This study was conducted to characterize the fish marketing sector of Maradi Municipality. The survey methodology used was sampling of stakeholders (fishermen, wholesalers and retailers) and the selection of survey sites (landing platforms, markets and outlets). The data were collected following surveys carried out with a sample of 130 stakeholders, including 35 fishermen and 93 traders, at two fishing sites (Mawaliya and Sabon Rouwa), a market and outlets in municipalities 1 and 3 of the region. This study shows that in Maradi, fish are mostly marketed as fresh, fried and dried. Only men are involved in fishing, and both men and women participate in the marketing of fish. Four main players have been identified in the supply chain: fishermen, fishers, wholesalers and finally retailers. It has also made it possible to identify the method of acquisition of the fish, the provenance, the method of conservation and processing, to assess prices and to analyse the relationships and organisation of the actors involved in the marketing of the products on the market. Marketing of fresh fish appears to be a profitable activity mainly for wholesalers and fishmongers. In order to improve the distribution of added value at all levels and promote the availability of products to all consumers, the state must actively participate in the social and professional reorganization of stakeholders.