Parotid abscess, uncommon in clinical practice, usually results from advanced developement from acults from advanced developement from acute suppurative parotitis. The common pathogenesis is retrograde bacteria infection via Stensen's duct by S. aureus and streptococcus species. A 72-year-old male patient developed a huge parotid abscess with bacteremia within 4 days after he received acupuncture and plaster therapy for his right parotid mass. Citrobacter diversus was revealed from both pus and blood culture. Citrobacter diversus is a species of anaerobic gram-negative bacteria that is rarely seen in parotid abscess but usually found in device or procedure related nosocomial infection in the literature. The patient was given wide-spectrum antibiotics to cover possible pathogenic bacteria. Then he underwent two operations: an urgent incision and drainage, and subsequent superficial parotidectomy. This patient was discharged one month after admission and no recurrence or complication was noted in our OPD follow-up. In our studies, this is the first report of acupuncture-induced parotid abscess with bacteremia caused by Citrobacter diversus in the literature.