<p>Nowadays, due to the development of the world, harmful gases and vapours have begun to enter the atmosphere significantly, so we are faced with the problem of air pollution and its low quality. This paper, therefore, focused on enclosed car parks, a parking system that needs to be well examined from an environmental perspective. It is not possible to predict in advance what levels of pollution from engines burning fossil fuels will reach in indoor environments. Because many factors can affect the concentration, such as vehicle type and fuel ventilation, as well as cumulative vehicle emissions in the environment. This study presents the relationship between indoor meteorology factors and pollutants besides evaluating the air quality in closed car parks by collecting the concentration of emitting pollutants. The data were aggregated from five garages in the centre of Konya province. The data were analyzed by using the program SPSS statistics 25. It has been mentioned the points that must be considered, measurements and suggestions to reduce air pollution in the car parks. Correlation coefficients showing the relationship between indoor air quality parameters and their importance levels were determined. According to the significance level, α = 0.05; It has been determined that there is a highly positive and significant relationship between indoor particulate matter (PM2.5, PM10). In addition, it was determined that there was a moderate and significant relationship between temperature and CO2 value. In addition, it has been determined that there is a weak positive relationship between particulate matter (PM2.5 and PM10) and gases (CO2 and CO) values, and between CO, PM2.5 and PM10 and Temperature value. There was a weak negative significant relationship between temperature and relative humidity. When the measurement results were evaluated, it was observed that the PM2,5 and PM10 levels in all car parks exceeded EPA, WHO specified standards, but the CO2 and CO concentrations were at acceptable levels according to the specified values, suggesting that certain ventilation measures need to be taken to reduce the concentration of pollutants in the garage.</p>