Children’s psychological disorders are complex and multidetermined, compounded by emerging cognitive styles, self-concepts, developmental trajectories, and environmental considerations that result in unique clinical demands. Consequently, child psychotherapy requires a broader conceptualization and individualized treatment. This chapter examines psychotherapy integration in working with children. The use of integrative treatments is central to children, although it is neither clearly identified nor well developed in research or practice. The authors examine assimilative, theoretical, and technical integration as well as common factors in treating children. A case example, a review of outcome research, and forecasts of future directions conclude the chapter.