This study was to investigate the metal accumulation from Ohjeoksan-Decoction to rat brain(Sprague Dawley). 1. In Control group, each metal concentration was within 26.65mg/kg. and in each experimental groups, was within 28.39mg/kg. And there were no significant metal concentration between control and experimental groups. Exceptionally, Cr and Ni level of control group was lower than experimental groups significantly. (p<0.05) and Cr and Ni level of experimental I group was lower than other experimental groups too. (p<0.05). But, Pb level of control group was higher than experimental groups significantly (p<0.05) Pb level of experimental I group was higher than other experimental groups(p<0.01) 2. In non-hazardous, hazardous and total metal concentration, there was no increase tendency in brain according to the high dose of OD(Ohjeoksan-Decoction) intake. Reversely, in experimental groups, hazardous metal concentration was decrease by high OD intake. (P<0.05) 3. Correlation among each metal in brain was various in each groups Briefly under the intake of Ohjeoksan-Decoction, that if very busy herb prescription , this study was defined within safety in brain metal level by P.O. during 10 days. But, there should be a more research about Pb increase by high dose OD intake