Objective Serologic proteome analysis method (SERPA) was used to compare the different of the serum proteins between normal and pancreatic cancer patients' serum, and to find a new specific pancreatic cancer marker. Methods HPLC was used to eliminate albumin from the serum, two-dimensional electrophoresis was used to separate the proteins. After imaging collection and analysis, the different proteins between pancreatic cancer and normal subjects were cut for mass spectrometry. Results Four discrepancy proteins were obtained. Guanylate cyclase-activating protein 2 was highly expressed in normal serum but not pancreatic cancer. Hp2-alpha, transthyretin and KIAA1018 protein were highly expressed in cancer patients'serum but not normal people. Conclusions KIAA1018 may become a promising tumor marker for screening and early diagnosis of pancreatic cancer.