Indolent B-cell Non-hodgkin's lymphoma is treated mainly with radiation and chemotherapy using a combination of chemotherapies, such as purine-analogues and CHOP (cyclophosphamide, doxorubicin, vincristine and prednisolone). After the approval of an antibody therapy agent Rituximab®, it alone or combination with CHOP has been introduced. Bendamustine hydrochloride has a unique structure compared with the marketed agents, and has an innovative mechanism of action. Thus, it is expected that Bendamustine hydrochloride will provide new alternatives for patients with indolent B-cell Non-hodgkin's lymphoma.