This study was carried out to understand the effects of Bambusae Caulis in Liquamen on blood sugar in the db/db mice. Refined Bambusae Caulis in Liquamen C. D(BCL.C. D)manufactured by high temperature production process and Bambusae Caulis in Liquamen(H-BCL) manufactured & distributed by HANLIM PHARM.COM., LTD were used. The Bambusae Caulis in Liquamen extracted from bamboo charooal manufacturing process was filtered and refined. The effects of Bambusae Caulis in Liquamen were administered orally to mice for 6weeks and its anti-diabetic effect examined. The effects of BCL.C. D and H-BCL were observed in terms of blood sugar. creatinine. BUN and GPT in db/db mice. The results were as follows : The amount of glucose was slightly decreased (P<0.05) in the B CL.C-treated groups compared with the control. The amount of glucose was significantly decreased (P<0.01) in the BCL.D and H-BCL-treated groups compared with the control. The amount of creatinine did not show any differences among four groups. The amount of blood urea nitrogen did not show any differences in the case of BCL.C-treated groups. but observed significant decrease in the case of BCL.D and H-BCL-treated groups. The amount of GPT did not show any differences in the case of BCL.D-treated groups. but observed significant increase in the case of BCL.C and H-BCL-treated groups.