INTRODUCTION: The present study aimed to determine the clinical value of serum procalcitonin (PCT) level in predicting postoperative infections after hepatectomy. METHODS: Medical records of 301 consecutive patients who underwent hepatectomy were retrospectively reviewed. We divided the patients into infection-positive and infection-negative groups. We investigated the changes in perioperative inflammatory markers such as C-reactive protein level (CRP) and PCT level. Associations between infectious complications and perioperative inflammatory markers were evaluated to identify predictive factors of infectious complications after hepatectomy. RESULTS: Postoperative infectious complications occurred in 67 (22.3%) patients. The areas under the curve (AUCs) using PCT levels on postoperative days (PODs) 1 and 3 were 0.794 and 0.845, respectively, whereas those using CRP were 0.493 and 0.641, respectively. PCT level had a better AUC than CRP for predicting postoperative infectious complications on PODs 1 and 3. Multivariate analysis indicated PCT levels on PODs 1 and 3 were an independent predictor of infectious complications after hepatectomy. CONCLUSION: PCT is the only predictive marker for infectious complications after hepatectomy and is valuable for detecting infectious complications from POD 1.