Transition process from kindergarden to primary school and it's theories were explained in this paperwork. Preschool program is compulsory in Republic of Croatia, and it is regulated by Acts of preschool education. It is emplemented in kindergarden, and it is run by preschool teachers. Every preschool theacher owns certain competencies for their work. The important part of their competencies is to appreciate competencies of a child before going to school. The theories of a child readiness were also explained in this paperwork. It is important that these theories are modern and emphasize inidividual development of a child. According to them, good transition is a responsibility of all actors working together. Study which is the part of this work is conducted between 78 preschool teachers from Zadar and nearby towns. It examined the attitude of preschool teachers towards their competence for running a preschool programme. Also, it examined their attitude towards competencies of a child and of a preschool teacher. Then, they highlight their opinion about parents attitude of a preschool programme. Their opinion is a result of an experience from work in a preschool programme. The majority of preschool teachers claimed great differences in understanding preschool programme by parents, and they emphasize importance of better parental awareness. They also claimed that parental attitude affects their work. We can conclude that it is important to work on connecting parents and preschool teachers, so that they can be better informed, which leads to partnership between everyone involved.