Background: Food insecurity condition challenges the availability of food, access to food, food supply stability, and food utilization. Food banks play a major role in the food aid sector by distributing donated and purchased groceries directly to food-insecure families, thus significantly impacting food insecurity. On the other hand, school meal programs are implemented in many countries to combat food insecurity among school-aged children. The synergy between school meal programs and food banks has a great potency to combat food insecurity among (...) children effectively. Aim: This study aims to examine the association between experts’ involvement—such as nutritionists, farmers, and private sectors—and community engagement, including parents and others, with the linkage between food banks and school meal programs among implementing countries. Methods: The Bayesian Mindsponge Framework, combining the reasoning strengths of Mindsponge Theory and inference advantages of Bayesian analysis, was employed on a dataset of 126 government representatives who manage large-scale school meal programs in 126 different countries. Results: Findings showed that the involvement of nutritionists and the private sector was positively associated with the linkage between food banks and school meal programs, while farmers’ involvement showed an ambiguous association. The engagement of parents and others also showed an ambiguous relationship with this linkage. Conclusions: Findings underscore the strong need to formulate strategies for increasing the involvement of nutritionists and the private sector to successfully link the food banks with school meal programs in implementing countries, which is crucial for effectively combating food insecurity among school-aged children. (shrink)