The school as a social institution with school employees and pupils as its social protagonists is an essential bearer of the educational process. Education trains a young person for life, it has the power of tolerance, equality, understanding, it gives opportunity for developing pupil potentials. Even more, the appearance of inclusive education that means the integration and inclusion of all pupils regardless of their individual needs, opens an opportunity to everyone. The inclusive education, although a several centuries afterwards in relation to the developed European countries, appears in Croatia. From day to day there are more pupils with diverse disabilities who participate the regular classes. Especially important, concerning this issue, is including the teaching assistant who tries to make easy and accelerates the whole process of integration in school. The teaching assistants are persons of diverse profile whose task is to give an individual support to the pupil with disabilities in the regular class. Although up to now,the teching assistants are not the school employees, their co-operation with teachers, pupils as well as with parents has the unquestioned importance. In support to this a high grade research has done which shows attitudes and opinions of the taching assistants, teachers and parents of pupils with disabilities. Their answers have been compared and the illustration of the teaching assistance importance in integration of pupils with disabilities has been obtained as well as advantages and disadvantages with which some testees come across inside the inclusive education and some ideas and possibilities for additional improvement.