The aim of this study was to explore the complexity of teachers' attitudes and perceptions about promoting their pupils' mental health in Kuwait middle schools. Specifically, the study aimed to investigate teachers' understanding of mental health and promoting mental health concepts. Further aims were to discover more about the contextual factors that shaped teachers' attitudes towards promoting pupils' mental health, and teachers' perceptions about barriers that might hinder the implementation of the promotion process. The study also attempted to elicit teachers' perceptions about the changes required to put promoting pupils' mental health into practice in Kuwait educational context. The study adopted a mixed-methodology approach within a pragmatic context in two stages. Data for the first stage were obtained from participants through a systematic survey conducted with 497 Kuwaiti middle school teachers, chosen randomly. In stage two, twelve teachers were chosen purposely to take part in semi-structured interviews. Data were analyzed quantitatively and qualitatively.