Liver abscess is a potentially life-threatening disease. The clinical features of pyogenic liver abscess are variable and probably correlate with a variety of pathogenic microorganisms and underlying diseases that may be involved. The most common pathogen of liver abscess in Taiwan is Klebsiella pneumoniae. Diabetes mellitus and hepatobiliary calculus are major diseases associated with liver abscess. Haemophilus parainfluenzae is a commensal of the upper respiratory tract, but is an uncommon isolate in liver abscess. We describe a 44-year-old man with liver abscess caused by mixed H. parainfluenzae and Fusobacterium necrophorum infection. He received percutaneous liver abscess drainage and intravenous antibiotic therapy for 3 weeks and fully recovered. No recurrence occurred during the follow-up period of 4 months.