The book arises from a concern regarding the specific demands of the experiences of trans people, putting on the agenda the debate on the importance and urgent need for the meeting and dialogue between the different fields of action for the construction of other institutional practices (governmental or not). ), whether social, psychological, legal or political, that respect and actually respond to their specificities. The work is a collection of texts from the seminar Challenges of Practices in the Field of Transdiversities, held at UERJ, from August 6 to 8, 2014, and is part of the Sexuality in Debate series, from the Sexuality, Gender and Society collection, publication of the Latin American Center on Sexuality and Human Rights (CLAM).