We report the case of an acute respiratory failure in a 36-year-old woman who presented a peripartum cardiomyopathy (PPCM). PPCM is a dilated cardiomyopathy with impaired systolic function that occurs between the last month of pregnancy and the five months following delivery. It is a rare disorder of unknown origin associated with high mortality (50%). Echocardiography confirms the diagnosis by showing a left ventricular dilatation and a decreased ejection fraction. Up to date, the treatment remains symptomatic.