Brevundimonas species are gram-negative, aerobic, and non-fermentative bacilli, which is widespread in the soil and water, and rarely causes infections in human beings. Most of the reported cases of Brevundimonas infection are immunocompromised. However, the isolated Brevundimonas infections were reported in immunocompetent patients too. The most frequent infections caused by Brevundimonas species, were urinary tract infections, bacteremia, septicemia, peritonitis. Lower respiratory infections are fairly rare than the aforementioned infections. Brevundimonas species can also cause coinfection with other microorganisms. Acinetobacter and Brevundimonas coinfection have previously been reported in urinary tract infections but have never been reported in the lung. Here we report an immunocompetent patient with a cavitary lesion in the lung, that was caused by co-infection of Brevundimonas spp and Acinetobacter Johnsonii.