Last years the process of transition from kindergarten to primary school has attracted considerable attention as a research topic in Greece. The purpose of this research, which had a sample of 1225 teachers and 1052 parents, was the investigation of their views about the barriers they face in implementing transition practices. The views' research was achieved through the use of a questionnaire. The result analysis indicated that there are many crucial barriers which complicate the transition process. Indicatively, we refer lack of continuity between the two institutions, lack of communication and cooperation between kindergarten and primary teachers, between teachers and parents, insufficient in-service training for teachers, the quality of the relationship with the teacher, the distance between the two institutions etc.