The present invention relates to: a composition for diagnosing pancreatic cancer, containing a preparation for measuring the expression level of a protein or a gene thereof, and capable of being used for determining whether there is a risk of pancreatic cancer; a kit; and a method for diagnosing pancreatic cancer by using the same. The present invention can significantly predict or identify the risk of pancreatic cancer or a precancerous lesion of pancreatic cancer, the early diagnosis thereof and the extent of diseases thereof by providing a diagnostic marker of pancreatic cancer, and can be utilized in the research of pancreatic cancer oncogenesis. In addition, the diagnostic method of the present invention can provide simple and early diagnosis of pancreatic cancer from the blood and the like in a non-invasive manner.