As Taiwan increasingly focuses on interprofessional collaboration (IC) in school mental health (SMH) services, understanding the perspectives of university trainers is vital. These trainers are instrumental in shaping the next generation of SMH professionals. To gain insight into their experiences, observations, beliefs, and visions regarding IC training and practice, a qualitative study was conducted, which involved virtual interviews with seven Taiwanese university trainers and employed directed qualitative content analysis to interpret the data. Four major, interconnected themes were examined and identified: (a) the current state of IC practices, (b) within-professional barriers, (c) systemic challenges, and (d) recommendations for fostering IC. The participants unanimously recognized the significance of IC in enabling SMH professionals to work effectively within integrated school-based teams. The study not only deepened our understanding of the hurdles and facilitators of IC in Taiwan, but also informed professional development initiatives to improve its implementation. Additionally, the findings led to the development of practical strategies and research directions for sustainable advancements in the psychological and practical facets of IC.