We report a case of successful treatment for bladder hemorrhage with intravesical alum irrigation. A 60 s woman, who had renal pelvis carcinoma and moderate renal dysfunction（eGFR＝48 mL／min／1.73 m²）, was hospitalized to our palliative care unit, for pain control of her lumber metastasis. During hospitalization, the patient showed dysuria and a lot of intravesical blood coagulum, which was caused from bladder metastasis. After bladder flushing, continuous bladder irrigation with saline was started. However, when we reduced the irrigation speed, dysuria appeared again. Thus, we started intravesical alum irrigation. Six days after this irrigation has started, we stopped the irrigation because no gross hematuria was seen any more. On the blood test done ninth day after irrigation, serum alminium level was 0.4μg／dL（normal value＜0.8μg／dL）. Three months after discharge from the hospital, the patient died, however, no gross hematuria or anuria were seen up to that time. Serious adverse effects with intracesical alum irrigation were reported in patients with renal dysfunction. However, if the renal dysfunction was moderate, intravesical alum irrigation with reduced doses seem to be safe and effective.