The thermal decomposition of the solid inclusion complexes of ferrocene and its derivatives with β-CD was studied by DTA, TG and DTG. The inclusion complexes contain crystallization water and the first decomposition stage corresponds to the dehydration of the complexes. The second stage is related to the liberation of the ferrocene and its derivatives, and the degradation of the β-CD structure takes place in the third stage. However, the second and third stages of decomposition for some of the inclusion complexes occur in the same temperature ranges and are impossible to distinguish. The final decomposition products formed around 500°C consist mainly of Fe2O3. The thermal behaviour of physical mixtures of these ferrocene derivatives and β-CD was also investigated. The thermal analysis results show that the interaction of ferrocene and its derivatives with β-CD is a chemical phenomenon. The ferrocene derivatives gain an additional thermal stability after inclusion complexation into the β-CD cavity. Thermal analysis methods can be used satisfactorily for the recognition of inclusion complexation. © 1995.