SUMMARY I ntroduct I on . Incidence of Guillain Barre syndrome is 1.2 to 1.7 for 100.000 habs in Colombia. Besides mortality this entity has a high socio economical impact because of its important probability to generate disability. We show the data correspondent to the group of patients with diagnosis of guillain barre syndrome in a 4th level colombian hospital emphasizing in clinical and pronostic factors. object I ve . To describe clinical and demographic features and outcome of patients with Guillain Barre Syndrome in the Hospital San Vicente de Paul in Medellin (Colombia) between 2001-2005.