The purpose of the research was to explore the collaboration between public libraries and schools in Hong Kong from the perspective of school librarians. Three school librarians were interviewed (semi-structured), and their responses were thematically analyzed. Collaboration between public libraries and the three schools was well received and supported by the principals at their respective schools. The three school librarians considered inter-lending to be a top benefit, as well as access to electronic resources. A goal was further collaboration with public libraries. In return, the school librarians were committed to promoting public library services through engaging in educational activities with teachers and students. Furthermore, outreach activities were a significant focus for collaboration. The study of public library and school library collaboration in Asian countries is largely missing from academic dialogue, especially studies focusing on collaboration in a large metropolis like Hong Kong. Through in-depth interviews and qualitative analysis, this paper is intended to fill the research gap in this particular area of study.