This work aims to illustrate the theological and pastoral contribution that Pope Francis reflection offers regarding the migration debate. The thesis was divided into three parts, each consisting of two chapters. The first part is entitled Migration today and the discernment of the Catholic Church. The first chapter presents, broadly speaking, the phenomenon of migration from a sociological point of view. The phenomenon of human mobility, precisely for this reason, has also always been at the center of the pastoral care of the Church. This is the theme that is developed in the second chapter. In particular, here we try to see how the Church, over the centuries, has gradually become aware of the migratory phenomenon, maturing a pastoral discernment and also organizing itself on a structural and institutional level. The second part of the thesis highlights and deepens the matrices of Francis discernment: Ignatian mysticism (chapter 3) and the Latin American reception of the ecclesiology of the people of God (chapter 4). Ignatius of Loyola, in his Autobiography, identifies himself as the pilgrim. In fact, as we will see, the characteristic of the experience of God that emerges here is precisely that of the pilgrimage; it is history itself that takes on the features of this great pilgrimage in which the human being, homo viator, is constantly called to recognize the traces of God, manifested each time as a surprise. God is the God of surprises, of the unheard novelty that we are called to recognize in an attitude of wonder and attention. Precisely because on the journey, man is never alone, but is part of a people, the people of God who throughout history is called, together, to seek God and find him in all things. The fourth chapter, then, focuses precisely on the Latin American reception of the ecclesiology of the people of God, trying to highlight the development, starting from Scripture, of this key paradigm of Vatican II and, subsequently, to analyze the reception that took place in Latin America through some authors: G. Gutierréz (option for the poor); J. Sobrino and I. Ellacuria (crucified peoples); L. Gera and R. Tello (theology of the people). Finally, the third part (chapters 5 and 6) examines the theological-pastoral perspective of Pope Francis, starting from the migratory phenomenon, for the life and mission of the Church. The fifth chapter examines the proposal of Francis, from the magisterial texts, speeches and homilies about the migration. Finally, the sixth chapter seeks to shed light on the progress made, proposing some tracks that branch off from this road for further study. In particular, we would like to present two major themes, central to the Pope s Magisterium - the outgoing Church and the mysticism of the We - marked by a rhythm that develops in four stages: being on the move and open to the surprise of God; the frontier; hospitality; the koinonia in difference, or the culture of encounter. The assumption in these terms of the migratory phenomenon opens up a clear evangelical ethos: communion in diversity represents an essential element for understanding the mystery of the Trinity just as it wanted to reveal itself to humanity, leading to the development of a new paradigm for being able to say God today; the pilgrim God.