The purpose of this study is to compare soil CO₂ efflux between crown fire site and unburned site dominated by Pinus densiflora forest in the Samcheock area of the East Coast fire in 2000 and measure soil CO₂ efflux and environmental factors between March to December, 2011. Soil CO₂ efflux was measured with LI-6400 once a month, and the 10cm depth soil temperature, air temperature, and soil moisture contents were measured in continuum with Data Loggers. Soil CO₂ efflux showed the maximum value in August as 417.8mg CO₂ m^-2 h^-1(crown fire) and 1175.1mg CO₂ m^-2 h^-1(unburned), while it showed the minimum value as 41.4mg CO₂ m^-2 h^-1(crown fire) and 49.4mg CO₂ m^-2 h^-1(unburned) in December. The result showed the high correlation between soil CO₂ efflux and the seasonal changes in temperature. More specifically, soil temperature showed higher correlation with soil CO₂ efflux in crown fire(r=0.95, P<0.001) and unburned site(r=0.96, P<0.001) than air temperature in crown fire(r=0.79, P<0.05) and unburned site(r=0.84, P<0.01). Q10 values showed higher sensitivity in unburned site(4.5) than in crown fire(2.5). The average soil CO₂ efflux was obtained with the exponential function between soil CO₂ efflux and soil temperature during the research period(279days), and it showed 2.5times higher in unburned site(12.2±8.9g CO₂ m^-2 day^-1) than crown fire(4.8±2.4g CO₂ m^-2 day^-1).