Bell pepper (Capsicum annuum L.) is the most cultivated and most marketed vegetable crop in the Diffa region. However, since 2015, insecurity related to the «Boko Haram» crisis has profoundly transformed the sector, leading to production restrictions in certain municipalities, notably Bosso. The present study aims to analyze the impact of the security crisis on bell pepper production and marketing in this municipality. The methodology used consists of documentary research, direct field observation, data collection through quantitative and qualitative surveys, and finally data processing and analysis. The results obtained showed that the security crisis had negative impacts on the bell pepper sector in the Bosso municipality. Thus, the surveyed producers reported that insecurity (50 %) and flooding (20 %) are the main constraints on bell pepper production in this area. The security crisis has led to a considerable reduction in the cultivation area and a drastic drop in production. Indeed, a decrease of nearly 780 hectares, or 90 % of the production area, and a drop in production of around 75 % have been observed. The crisis has also caused a reduction of over 80 % in the average annual income of traders. Furthermore, the restrictive measures of the state of emergency imposed by the government have negatively affected the production and marketing of peppers in the study area. To cope with this crisis situation, producers have developed several local strategies such as paying taxes and fees to the GANES, reducing the cultivation area, reducing working hours in the field, mobilizing a significant workforce, and adjusting their cultivation calendar. These results highlight the need to strengthen the organization of the market and sector actors while implementing appropriate support measures to revitalize the production and marketing of bell peppers in the municipality of Bosso.