The bleaching of non vital teeth that is described in this article has demonstrated to give good clinical results, and because of its easy way to apply we believe that it is the option for the treatment of this teeth, as long as we have a good an realistic diagnostic considering the results we may obtain. One the selection has been made we proceed to the bleaching, the substances that we use are easily obtain, superoxol and sodium perborate. The preparation of the tooth began with the removal of any restauration or decayed tissue that is may present after this we remove the material from the pulp chamber 1 mm below the gingival margin, then clean perfectly the chamber, then we deshidrate the tubulae, then put a pellet of cotton on the vestibular wall of the chamber, put some superoxol in the cotton, heat it up, remove the cotton, put some sodium perborate and hidroge peroxide paste in the chamber and seal it with cavit, and wait from 3 to 7 days for results.