Resumo: This article presents a comparative analysis of the novels O cortiço (1890), by the Brazilian writer Aluísio Azevedo, and Emigrantes (1928), by the Portuguese author Ferreira de Castro. The goal is to identify how Portuguese people who emigrated to Brazil were represented in characters of these works. It was found that, in O cortiço, migration appears as degeneration caused by the hostile social and natural environment of Brazil, according to the premises of the naturalist aesthetics. Under the influence of the sun, poverty and the Brazilian human landscape, the Portuguese people either get rich by stealing and exploiting labor, including slavery, or undergo a life of addiction. On the other hand, in Emigrantes, this migratory flow appears as a mirage, because the possibility of enrichment in America fades away in the confrontation with the concrete experience of the characters. In the study, contributions from critics Antonio Cândido, Eduardo Lourenço and Miguel Torga are mobilized, as well as statistics that contextualize Portuguese immigration in Brazil.Palavras-chave: migração portuguesa no Brasil; Aluísio Azevedo; romance naturalista; Ferreira de Castro; Realismo; literatura comparada.Abstract: This article presents a comparative analysis of the novels O cortiço (1890), by the Brazilian writer Aluísio Azevedo, and Emigrantes (1928), by the Portuguese author Ferreira de Castro. The goal is to identify how Portuguese people who emigrated to Brazil were represented in characters of these works. It was found that, in O cortiço, migration appears as degeneration caused by the hostile social and natural environment of Brazil, according to the premises of the naturalist aesthetics. Under the influence of the sun, poverty and the Brazilian human landscape, the Portuguese people either get rich by stealing and exploiting labor, including slavery, or undergo a life of addiction. On the other hand, in Emigrantes, this migratory flow appears as a mirage, because the possibility of enrichment in America fades away in the confrontation with the concrete experience of the characters. In the study, contributions from critics Antonio Cândido, Eduardo Lourenço and Miguel Torga are mobilized, as well as statistics that contextualize Portuguese immigration in Brazil.Keywords: Portuguese migration in Brazil; Aluísio Azevedo; naturalistic novel; Ferreira de Castro; Realism; comparative literature.