The treatment alliance has been described in the field of research to play an important role in the recovery of patients in psychiatric care. However there has been relatively little research concerning the treatment alliance specifically with children. The aim of this study was therefore to examine the role of the treatment alliance and how professionals work with the treatment alliance with children. Data was collected using qualitative interviews with six professionals from different Child and Adolescent Psychiatry Intermediate Care units located in Stockholm. The interviews were analyzed using thematic analysis. The themes that emerged were; The different dimensions of the treatment alliance, To create entrances and To take care of a treatment alliance. The theoretical tools that were used to interpret the results of this study were role theory and concepts from Child Alliance Process Theory. Our conclusions showed that professionals need to develop a treatment alliance not only with the child but also with their parents. Professionals also described the work with the treatment alliance as a two-part process that contains ways for professionals to develop and nurture the treatment alliance with children.