Observation on the vertical distribution of the sea ice temperature was carried out at a station near Syowa Station. During the monthly observation from September 1984 to January 1985,the thickness of ice varied between 139cm and 155cm. Since the bottom ice temperature resembled the underlying seawater temperature, while the surface ice approached the air temperature, distribution of temperature generally showed a steep gradient across ice. The sea ice temperature at the surface and the bottom varied from -15.2 to -0.3℃ and from -2.0 to -0.3℃, decreasing with depth. The minimum temperature of sea ice rose from September to January.