To provide a treatment method for completely and safely detoxifying an asbestos-containing waste material in an optional form.

The treatment method of the asbestos-containing waste material is performed by the physical treatment of making asbestos in the waste material nonasbestos and turning it to a detoxification treated object by finely pulverizing the asbestos-containing waste material and the mechanochemical treatment of making the asbestos in the waste material nonasbestos and turning it to the detoxification treated object by impregnating the asbestos-containing waste material with an alkaline aqueous solution and then pulverizing the waste material. Especially by adopting a mechanochemical reaction process, the structure destruction of the asbestos is accelerated.