Many pupils with disabilities receive schooling in segregated contexts, such as special classes or special schools. Furthermore, the percentage of pupils educated in segregated settings has increased in many European countries. Studies suggest that there is high commitment to the general ideology of inclusive education among teachers in 'regular' education in many countries. This survey study investigates the views of teachers in segregated types of school about education. A questionnaire was sent out, in 2016, to all Swedish teachers (N = 2871, response rate 57.7%) working full time in special classes for pupils with intellectual disability (ID). On a general level results show that there is a strong commitment to preserving a segregated school setting for pupils with ID, a limited desire to cooperate with colleagues from 'regular schools' and a view that schooling and teaching are not quite compatible with the idea of inclusive education. The results highlight the importance of investigating processes of resistance within segregated schools to the development of inclusive schools and education systems. We argue that, while research and debate about inclusive education are important, both are insufficient without analyses of existing types of segregated schooling.