乙胺丁醇（英文名：Ethambutol；简称：EMB 或 E）是一种抑菌性抗结核药物。在结核病治疗中，作为一线药物常与其它抗结核药联合使用。

乙胺丁醇的常见形式是其盐酸盐，为白色结晶性粉末。

Ethambutol (commonly abbreviated EMB or simply E) is a medication primarily used to treat tuberculosis. It is usually given in combination with other tuberculosis drugs, such as isoniazid, rifampicin and pyrazinamide. It may also be used to treat Mycobacterium avium complex, and Mycobacterium kansasii.