The kinetics of the thermal decomposition of basic cobalt carbonate was investigated under non-isothermal heating in air media using thermogravimetric analysis (TGA). TG-DTG curves showed that the decomposition proceeded through two well-fined steps in air. Weight loss of the thermal decomposition of basic cobalt carbonate was in good agreement with the theoretical weight loss. The isoconversional method has been applied to the data in order to evaluate a dependence of the effective activation energy on the extent of conversion, and the possible conversion functions have been estimated through the multiple linear regression method. The average apparent activation energies of the second steps (0.4 <= alpha <= 0.9) were 96.607-144.537 kJ/mol.