This paper is focused on various aspects of a specific kind of kinship foster care provided by grandparents. Major goals of the part of the extensive research presented in the paper are to characterize the process of the acceptance of a child into a foster care by grandparents, examine the most common reasons for the need of foster care, capture the ways children react to the separation from their biological parents and, last but not least, describe children’s re­lationships with their parents, their mutual contact and expectation of the relationship’s fur­ther stages. These goals are evaluated from the grandparents' perspective. Methodologically, the paper is based on a qualitative research. The screening method used in the paper was the semi-structured interview with grandparent fosters. The sample consisted of 20 women and men – grandparents who have been providing foster care to at least one grandchild for the minimum of two years. In total, there were 21 grandchildren in grandparents’ foster care researched. The results of the research show that children come to foster care for a variety of causes, which we divided into three categories: socially unacceptable behavior of the parents (alcohol/drug abuse, being involved in crime, physical abuse of the child, neglected child or similar reasons), personal qualities of the parents (immaturity to raise a child due to parents’ early age, irresponsibility, aggression, psychological instability) and parents’ personal life events (end of a partner relationship, abandoning the child, relocation, job loss, lack of funds, …). Children’s re­actions to the separation from parents showed on emotional, cognitive and behavioral levels. 15 of the children were personally in touch with their mothers, while only 8 with their fathers. Due to the rising number of grandparents providing kinship foster care the findings of the research can be found useful in the field of psychological counselling or for professionals working with foster families.