Abstract: Background and Objective: One of the external factor which influence the survival of termites is temperature. Termites try to maintain the temperature inside the nest within a certain range in order to survive. The objective of this research is to analyze the temperature inside nests of subterranean termite Coptotermes curvignathus. Methodology: This study was conducted at the Termite Rearing Unit, Faculty of Forestry, Bogor Agricultural University. Temperature inside the nest of C. curvignathus and indoor temperature in the laboratory were simultaneously measured using thermocouples. Data analysis was based on sinusoidal equation model. Results: The results showed that average temperature in the nest was 31.4°C which was 1.3°C warmer than indoor temperature in the laboratory. The data showed that temperature range in termite nest were narrower than indoor temperature range in the laboratory. It was determined based on value of the amplitude which represent the maximum and minimum temperature. Conclusion: Termites can maintain the temperature inside the nest so it become less fluctuating than its surrounding.