This article explores the beliefs of 25 Spanish primary education teachers who develop inclusive pedagogy when planning and implementing actions for all students. We used a qualitative methodology and the data were gathered through semi-structured and in-depth interviews. We analysed the data using an inductive coding system. The results revealed the beliefs of the participants about diversity and inclusive education, their professional self-concept, how they understood learning and their beliefs about their self-efficacy as teachers. These teachers showed a humanistic perspective that welcomes diversity and they felt responsible for the presence, learning, happiness and success of all their students.