The diploma thesis refers to a specific question of a kindergarten adaptation of three-year old children. The theoretical part covers the characteristics of a three-year old child from the point of view if his/her development level, necessaries of life, socialization, and psychic stability, and studies the coherence between the above-mentioned characteristics and the child's adaptation to a kindergarten. The practice-oriented part maps the most common problems with adaptation of three-year old children and compares the level of successful adaptation of three-year old children in homogenous and heterogeneous classes. Furthermore, this part studies also the interval of child's adaptation to his/her family, mainly the organizational and relationship changes. In the conclusion, the reasoning about possibilities of further use of this study for kindergarten teachers takes place
