The theme study: "Linguistic Analysis based on noun subordinate clauses: a proposal of description and teaching for elementary school classes", has as its object of investigation the direct objective noun subordinate clauses. This object had linguistic analysis as a parameter for teaching, because these practices enable the student to exercise the full analysis of linguistic knowledge that involves syntactic, semantic and textual discursive aspects; thus developing awareness of these aspects and enabling students to expand their reading comprehension and interpretation skills, as well as textual production practices. For the effectiveness of the linguistic analysis practices, an intervention proposal was developed in a sequence of ten classes, some of forty-five minutes and others of ninety minutes, with the participation of forty-nine students of the ninth grade of Elementary School. The intervention proposal was created from classroom observations through the experience of the research teacher, as well as the problematization addressed in discussions and reflections of theorists such as Geraldi (1984, 2004), Neves (1997, 2006, 2021), Perini (2006) and Antunes (2007, 2014), regarding the role of the Portuguese Language Teacher, that is, what he should teach to a student who masters the language to be taught. It is also hoped that, with this study, it is possible to suggest to the Portuguese language teacher an experience of practices of the linguistic/semiotic analysis axis, which is part of the Portuguese Language curricular component found in the current guiding document of basic education in Brazil, which is the National Common Curricular Base – BNCC (2018).