Cow manure chars were prepared at the carbonization temperature range of 400-1000℃. The prepared chars were used in the removal of H_2S. It became clear that the removal ability depended on the ash content. And it was found that the ability was improved greatly by coexistence of char and ash. The H_2S removal ability of the cow manure char prepared at 1000℃ was almost same as that of the commercial activated carbon for removal of H_2S.