This study was carried out to investigate monthly change on soil respiration rates, soil temperature, soil water content and soil pH by thinning treatments (heavy thinned, light tninned, control) of black pine (Pinus thunbergii) stands from March 2012 to February 2013 in Wola National Experimental Forests in Jinju, Gyeongnam province. Monthly variations of soil respiration were not significantly different among thinning and control treatments. The annual mean soil respiration rates were 0.58g CO2/m2/h for the light thinned, 0.49g CO2/m2/h for the heavy thinned, and 0.45g CO2/m2/h for control treatments. There was a significant exponential relations between soil respiration and soil temperature, but no correlation between soil water content or soil pH and soil respiration in the thinning and control treatments. The values of Q10 were 3.40 for the light thinned, 3.20 for the heavy thinned and 3.06 for the control treatments. The results indicate that soil respiration rates in black pine stands were little affected by thinning treatments.