This study concerns the continuing professional development (CPD) of vocational teachers and recognizes the dual professionalism of vocational teachers as having a particular focus on the professional development related to the teachers’ vocational subject areas. The study takes place in Sweden, in VET on upper secondary level. Swedish vocational teachers normally work full-time and spend most of their days at school, and how they meet the demands of contemporary vocational competence differ. They have varying opportunities and options for CPD, and this study explores to what extent and how the vocational teachers cross boundaries between school and other communities of practice to take part in various types of CPD. The vocational teachers’ perceived results of the CPD, as well as barriers and opportunities/motivation for participation are also investigated. The analysis is based on survey data on vocational teachers’ participation in CPD activities and draws on a socio-cultural perspective on practices, identity and learning, and theory concerning adults’ participation in education and barriers towards this.