SummaryThe author tries to fix some informations about the hernia diaphragmatica traumatica.He gives a definition of this hernia and subsequently an historical study of this affection.The investigation of the causes of the H.D.T. is made according to the sex, the age and the business of the patients.The author proposes a classification of the H.D.T., based upon its etiology and its pathological anatomy.The anatomo-pathological study contains informations upon the localization of the burst, the evolution of the burst, the orifice of the hernia, its localization on the left or on the right, the sack, the internal organs it contains and the evolution of the hernia itself.