Inclusive education is a controlled process that creates an environment for education and training, respect for diversity, abilities, and various educational needs of a child or pupil. It is topical in most countries’ professional and legislative discourse. It turns out that teachers’ attitudes are one of the main pillars of inclusive education policy implementation. The present research aimed to pursue connections and relationships between the teachers’ pro-inclusive attitudes, length of experience, and content of their learning activities. The research sample consisted of 926 kindergarten and elementary school teachers; the TAIS was used (Saloviita, 2015) as the research tool. Results showed that kindergarten teachers had more positive attitudes towards inclusive education than elementary school teachers. There are themes in education through which elementary school teachers can be developed pro-inclusive attitudes.