Sustainable Development Goal 2 (SDG2) aims to end world hunger, but Africa is currently not on track to meet this goal. Sub-Saharan Africa is particularly affected, with a significant increase in undernourished people. The issue of food security is, therefore, a pressing concern, and promoting trade has been suggested as one solution. This study examines the impact of cereal import openness on the prevalence of undernourishment in 27 Sub-Saharan African countries for the period 2000 - 2020. Using a two-stage least square instrumental variable (2SLS-IV) estimator, we find that greater cereal import openness is significantly associated with higher levels of undernourishment in sub-Saharan Africa and then increased food insecurity. Our results are robust to alternative food security indicators.