In this study, aimed to investigate the effect of bacterial fertilizer: A (Bacillus spp., Trichoderma spp. ), B (Azorhizobium, Azotobacter and Azospirillum) and C (Azotobacter spp., Bacillus spp. and Pseudomonas putida) on soil carbon mineralization. On the application of A, B and C bacterial fertilizers on the sterilized control soil, whose initial carbon mineralization rates is 1.1%, mineralization rates of 5.12%, 3.54%, and 10.78% were respectively recorded. According to these results, it was observed that the application of bacterial fertilizer increased the carbon mineralization rate of the sterilized control soil by 365.45%, 221.82% and 880%, respectively. A carbon mineralization rate of 7.03%, 6.15% and 12.95% was recorded in the non-sterilized soil sample whose initial carbon mineralization rate is 5.1%, thereby increasing the mineralization rate by 25.31%, 9.63% and 130.84%. The application of the bacterial fertilizer to the soil was found to increase the soil carbon mineralization rate. It is recommended to incorporate bacterial fertilizers with CO2- sequestering materials, such as biochar, to mitigate the fluctuations in the natural balance due to carbon release.