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Benzene is one of volatile hydrocarbons contained in fire smoke, and the concentrations in the blood are known to be positively correlated with that of carbon monoxide-hemoglobin (CO-Hb) in fire-related deaths. In this report, we present a vehicle fire case in which CO and benzene concentration is atypically un-correlated. The car driven by the vehicle dweller ran into an oncoming lane at high speed, hitting a traffic signal pole. A vehicle fire started when the rescuer opened the car door. A burned body and briquette stove were found when the fire was extinguished. An autopsy revealed a small amount of soot deposit in the airways. The CO-Hb concentration in the heart blood was 63%. Volatile hydrocarbon analysis of the blood was performed; compared with the CO-Hb concentration, the benzene concentration was significantly lower than expected. High CO-Hb concentration without a hydrocarbon component …