An increase and high recidivism rate among offenders with mental illness bring the questions about the effectiveness of institution-centered approach. In addition, there are is various approaches focusing on treatment rather than punishment to deal with complicated issues related crime and mental illness. In particular, the concept of community integration has been emphasized for the successful rehabilitation of offenders with mental illness. However, previous studies only treated this issue in a theoretical and conceptual way without comprehensive understanding using critical principles and practical examples. This study aimed to discuss multidimensional community integration for the successful rehabilitation of offenders with mental illness. Further, we suggested specific and applicable solutions for successful community rehabilitation by introducing examples of other countries. This study discussed the statistics, problems of current approaches for offenders with mental illness in Korea, and the multidimensional concept of community integration. We also provided 8 principles for community integration based on the analysis of foreign case study and introduced various programs in correctional facilities and community agencies. Last, we discussed about tasks for successful community integration of offenders with mental illness.