Inclusive education aims to ensure equitable access to quality education for all students, including those with Autism Spectrum Disorder (ASD). This research analyzes the attitudes and competences of non-university Spanish teachers regarding the inclusion of students with ASD, considering relevant variables in previous studies such as teacher training, prior experience, and educational context, among others. The study involved a sample of 2310 teachers in active service during the 2023–2024 school year. Data collection was conducted through two questionnaires: the INTEA-EDG questionnaire, designed to measure teachers’ beliefs and attitudes towards the inclusion of students with ASD, and the CEFI-R questionnaire, which evaluates teachers’ competencies and skills for inclusive education. The results reflect a generally positive attitude towards the inclusion of students with ASD in mainstream schools, although significant variations were found depending on variables such as previous experience, teaching specialization, and specific training received. Based on these and other findings, the study highlights the need to strengthen initial and continuous training in inclusive education and attention to diversity of students with ASD, promote early positive contact with students with ASD, and foster collaborative work and the design of inclusive learning environments. © 2026 by the authors.
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