This study examines transnational nativity as one of the most essential terms of the postcolonial theory. It deals with the consequent steps of the struggle which the immigrants, who belong to either the West or the East, have to pass through in order to become transnational natives in any host society. Weakening their authenticity without completely uprooting themselves from their original culture, is the first step which the immigrants should pass through in their new host society. The next step requires a real dwelling in the beyond of the immigrants` motherlands which could be either the West or the East. Such an act imposes an inevitable conflict with the other, who the immigrants need to communicate with. That is why the immigrants attempt to pursue the affinities with the other. In other words they need to hold negotiation with the natives of the host society. In Exit West by Mohsin Hamid, the major characters Nadia and Saeed depart their home, the unknown city through ordinary room doors which turn to be fictional because they have transferred them to far away countries. Nadia and Saeed pass through these doors to Mykonos island then London and finally Marin. In their long journey, they pass through the previous steps of transnational nativity. They could only put an end to their conflict with the others by pursuing the affinities with them at Marin. In this city love relationships which they have with others conquer the sense of antagonism between the different races. Nadia and Saeed make love the password which settles the issue of transnational nativity in the First world. In a similar vein, the Third and First worlds become homes for Hamid`s diverse minor characters who pass from other fictional doors and fulfill transnational nativity stages of struggle. While Hamid puts a successful end to the protagonists` struggle, he lets some of his minor characters` struggle goes on without giving a satisfying end. Also, he uses other minor characters to portray man`s fear from, or denial of transnational nativity in the East or in the West