Objective: To grasp the social representations of nurses about "being young" and HIV prevention in young people. Methodology: This is a qualitative study conducted in four Basic Health Units of northwestern Paraná (Brazil) with ten nurses using the Theory of Social Representations about "Being Young" and "HIV Prevention in Young People" through interviews and evocations analysis. Results: The main evocations of nurses are related to the vulnerability of young people to risk behaviors and the need for a contextualized sexual education. The Health at School Program was cited as a way to improve information about sexual health and condom use, promoting workshops that deconstruct stereotypes. Collaboration between education and health is essential to empower young people and improve their living conditions, especially in contexts of social vulnerability. Final considerations: The social representations of nurses point out that, although youth is often associated with freedom, it is also linked to risks. In this context, education on the use of condoms and strengthening social support are fundamental, as they promote open dialogues and partnerships between schools and health services, aiming at an integral and preventive approach to sexual health of young people.