The purpose of the present study was to identify which factors in care management affect client outcomes. We performed path analysis using care management processes as independent variables, and client outcomes measures as dependent variables. Client outcomes were measured by improvement in care items and Functional Independence Measure (FIM) scores in 170 clients, and client satisfaction in 97 clients. Improvement in care items was significantly related to the amount of service. Deterioration of the functional independence level was significantly related to the amount of service and lower implementation of monitoring. Higher implementation of evaluation raised client satisfaction. It is important for care managers to develop a care plan based on the necessary amount of service and to perform monitoring. A sufficient amount of service in the care plan and higher implementation of monitoring and evaluation are the three factors in care management affecting client outcomes.