Abstract : Qualitative, action research with the aim to develop strategies assuring the safe and efficient disposal of medical waste in pediatric hospitalization units. The study was carried out in two hospitalization units of a children?s hospital in south Brazil. Study participants were 30 professionals from the nursing team. The study was based on the principles of Paulo Freire?s problem-posing methodology. Data were collected in July and August 2014, at meetings using the arc of Charles Maguerez, which promoted dialogue and enabled those involved to actively participate in the process. Data analysis respected the foundations of qualitative research. The data obtained in the meetings were transcribed in their entirety and categorized after a thorough reading, by grouping them by similarity or disagreement, and preparing them to the dialogical phase with the conceptual framework and literature. The results of this dissertation demonstrate that the professionals had little knowledge on the matter of medical waste, which directly interferes in its safe and efficient disposal. Once they noticed the problem regarding the inappropriate disposal of medical waste and their lack of knowledge on the subject, the professionals pointed out that the provision of tools and moments of dialogue in the care daily routine are essential strategies to enable changes related to this practice. The development of this action research allowed not only the provision of tools to the nursing team professionals, but also enabled them to detect flaws, driving them to correct the issues related to the inappropriate disposal of medical waste. Nursing can be the starting point for the appropriate segregation of such waste, through qualification, training, supervision and the study of specific cases, providing a broad view of the Waste Management Program and its influence on better quality of life. These results reiterate the need for reflection spaces in the routine of the care practice. Finally, the development of further studies in this area is recommended, either with nursing students or professionals working in hospital and in primary care settings, so as to learn the routine handling of waste in health11services and institutions and in the nursing education environments, allowing the identification of strategies to guarantee the safe and efficient disposal of such waste. The coordinating nurse of the units should take over the question of permanent education in the care routine, enabling constant dialogue on the subject. It is important for institutions to deal with this question more seriously, contributing to the care for the environment and the quality of life of workers and the community.