<p>This research article will be carried out through the collection reading and analysis of the different legal foundations and jurisprudence of the high courts, whose objective is to establish the responsibilities generated by the occurrence of an accident at work or an occupational illness caused to worker by reason of or in connection with his work activity especially the civil liability to the employer’s to the fault and the border of proof. In the work contracts arise obligations foot the parties, that is why, a consideration will be made when s worker suffers an accident at work at on occupational disease by reason of or in connection with this work activity, causing injuries to his/her physical integrity and even his/her death, causing several responsibilities towards the employer, when by carelessness, negligence, imprudence have caused damages to the worker as well as indirect or injured victims.</p>