Studies on the indoor air quality inside newly producted vehicle have made mainly mention of the concentrations for indoor air pollutants or of subjective symptoms, such as irritated eyes and nose, headache and dizziness. That is, there has been no report about how poor indoor air quality inside newly producted vehicle affects vehicle drivers. We measured the indoor air pollutants inside newly producted vehicle and evaluated the neurobehavioral performance of drivers, using a computerized neurobehavioral test (color word vigilance), between a newly producted and a 11-year-old vehicle. Inside the newly producted vehicle, the formaldehyde concentration with closed window was 19.1㎍/㎥. The concentration of VOCs with closed window was 3.9㎍/㎥ for benzene, 316.7㎍/㎥ for toluene, 20.5㎍/㎥ for ethylbenzene, 47.7㎍/㎥ for m,p-xylene, 15.1㎍/㎥ for o-xylene, and 15.3㎍/㎥ for styrene. The neurobehavioral performance of drivers inside newly producted vehicle with the computerized neurobehavioral test was 11.05% lower than that for those inside 11-year-old control vehicle. These results suggest that the poor indoor air quality inside newly producted vehicle affects the neurobehavioral performance of driver and a proper evaluation of the indoor air quality inside newly producted vehicle is required into the health effects of pollutants with objective tool, in addition to the level of pollution. Keywords：Indoor air quality, Neurobehavioral test, Newly producted vehicle