Despite the convergence of interests of Mexico and Canada in international relations, the coincidence in time of their common interests and the complementarity in the policies to achieve them have given an unusual dynamism to the relationship between these two countries, studies on the evolution of the Mexico-Canada relationship are few. In both countries, the study of the various aspects of the relationship with the United States, the most important economic partner for both, has tended to focus attention to the detriment of the analysis of the relationship with the other North American neighbor. This issue of the Revista Mexicana de Política Exterior wants to record not only the current state of the relationship between Canada and Mexico, but also the importance that it has acquired for each one.