Ochrobactrum anthropi (formerly Achromobacter spp.) is an aerobic, motile, oxidase positive and lactose negative gram negative bacillus which is widely distributed in the environment and water sources. In recent publications, O.anthropi has an increasing importance as a nosocomial infection agent. The aim of this report was to present a case of O.anthropi bacteremia developed after endoscopic retrograde cholangiopancreatography (ERCP). A 89-year old female patient presented with high fever one day after ERCP performed due to klatskin tumour. O.anthropi had been grown in blood culture (BacT/ALERT 3D, bioMerieux, Durham, USA), and the isolate was identified by automatized system (VITEK, bioMerieux, Marcy I'Etoile, France). Since there was no clinical response to empirical ceftriaxone therapy, it was switched to meropenem, which was found effective by VITEK antibiotic susceptibility detection system. The patient was treated successfully with meropenem therapy (3x1 gr/day, 10 days). As a result, in case of suspected post-ERCP bacteremia, unconventional microorganisms such as O.anthropi should be taken into consideration.