Acute pancreatitis is a common gastrointestinal disease that is associated with significant morbidity and consumes enormous health care resources. As such, it requires up-to-date evidence-based diagnosis and standard treatment guidelines with broad support from the clinician. Korean Pancreatobiliary Association has developed clinical practice guidelines for the diagnosis and treatment of acute pancreatitis to provide a framework for clinicians to manage acute pancreatitis and to improve national health care. The guidelines were divided into four parts: the diagnosis of acute pancreatitis, the assessment of the severity, the initial management, and the treatment of necrotizing pancreatitis and local complications of acute pancreatitis. In this article, we summarize and present the diagnosis and treatment guidelines for acute pancreatitis established in Korea.