The methodological approach of the final work is based on a review of theories and previous research. The general goal of the work is to contribute to the understanding of the process of mourning in children and adolescents due to the loss of parent’s. The work presents many prejudices that exist in adults related to loss and may affect the start, course and outcome of mourning process in children and adolescents. The specific aim of the work is to present and analyse the specificities of the mourning process. The mourning process at children and adolescents includes learning about losing and dying, considering the difference in age, the need of grieving children and adolescents, factors that may affect the process of mourning, the success of adaptation to a new lifestyle or the appearance of mental and physical problems, the perception of death and the way of responding to the loss dues to the pre – school, school and adolescence period, and the role of various participants from the child’s environment in providing support during the mourning process. It is necessary to understand the cognitive and psychosocial development of grieving children and adolescents to provide them an adequate support from parents and other adults, with emphasis on the role of educators and teachers, in the process of mourning, and especially professional support if the mourning process is complicated and the person using their own coping strategies can not deal with the changes in their lives.