Leptospirosis is an emerging zoonosis of worldwide importance. Its distribution is closely linked to hydrometric conditions. It is characterized by a wide clinical range, from the subclinical form, or one with few symptoms; which resolves spontaneously, to the multi-visceral form, known as icterrohemorrhagic disease or Weil's disease, with a lethal risk. All organs can be affected but with variable frequency. Pancreatic involvement is not well documented. We describe a 45-year-old man with Weil's disease associated with acute necrotizing pancreatitis. The evolution was favorable but required a three-week stay in the intensive care unit.