The paper presents the results of the research with the basic goal to study the readiness of primary school teachers to accept disabled students. Research participants were 205 teachers from primary schools at the territory of Serbia. The goal was accomplished through: (a) studying attitudes towards joint education of disabled students and their peers; (b) studying teachers' experiences in working with disabled students; and (c) studying teachers' readiness to accept disabled students, depending on their involvement/non-involvement in projects of inclusive education. Teachers express supportive attitudes towards joint schooling, but more than one half of them think that a selective approach is necessary in that process, according to the kind and degree of developmental disability. They support joint schooling from the humanistic point of view, but express concerns about the academic achievement of classes that include disabled students. The majority of teachers had experience in working with disabled students and based on that provided interesting suggestions for improving joint schooling. Higher readiness for accepting disabled students was demonstrated by teachers whose schools were involved in the projects of inclusive education. That implies the need for involving schools in similar projects and enabling teachers' immediate contact with students with developmental disabilities.