Since the Council Vatican II many theologians devoted themselves to the task of redemption of the meaning of the Trinitarian revelation of God for Christian life. The moral theology, in individual, received several contributions. The development of Christology and Pneumatology has contributed to the understanding of new ethics implications about God’s mystery, in a special way. For this reason, the present work aims, first of all, to think about the importance of the Trinity for the Sexual Moral. In aspect, a rich possibility of renovation of the Sexual Moral appears with the diversity of moral models associated to each Trinitarian person, such as the imitation of the Father, the affiliation, the fraternity-sorority, the maternal care, the covenant, the imitation and fellowship with Christ, the new law, the life in the Spirit, the sanctification, etc. Second of all, finding the principal encyclicals that treat the subject of the sexuality, knowing, Arcanum Divinae Sapientiae (Lion XIII), Casti Connubii (Pio XI), Humanae Vitae (Paul VI), Evangelium Vitae (John Paul II) and Deus caritas est (Benedict XVI), we look to respond to the question of the importance given to the Trinity by the pontiffs in these documents. For that, we devote ourselves to a rigorous analysis of the God s nomination in each one of the quoted encyclicals. Finally, we note, that in spite of the significant advancements, the magisterial speech about the sexuality still lacks for a Trinitarian articulation. And from this observation, we present some perspectives that would open to a more elaborated Trinitarian Sexual Moral.