Crohn's disease is mysterious chronic inflammatory bowel disease. It usually happen in the young age and last forever. It is not yet clearly known the origin of crohn's disease. However, crohn's disease therapy is getting developed by using immunosuppressant and TNF-alpha inhibitor. Nonetheless, some patients still don't react to TNF-alpha inhibitor which is most effective treatment. Also, Even though some other patients reacted to the treatment at first, the effect of treatment decreases over time. Plus, long-term use of TNF-alpha inhibitor can lead to complication of infection and occurrence of malignant tumor like lymphoma. Recently, treatment of intractable crohn's disease is attempted by using stem cell. Especially, Mesenchymal stem cell is well-known for immunosuppression, anti-inflammatory ability and cell differentiation ability to various lineage cell as non hematopoietic stromal cell.