The present investigation is guided to prove that the article 367° of the Peruvian Civil Code have deficiencies in its writing, because it prescribes that the action to answer the paternity corresponds the husband. Then it adds that their heirs and their ascendancies can begin it if he has died before being conquered the term (90 days) pointed out in the article 364° of the same body of laws, the one which expressed a restrictive and very questionable character, because our Civil Code follows the same outline of the French Civil Code, however, in other legislations, its proven that the husband cannot only answer the paternity, but also the son and their heirs in wide form, for we are intending a modification of the referred article, in agreement with the compared law. After the analysis of the doctrine and national and compared legislation, we have established that there is really a le...