The supramolecular inclusion compound of β-cyclodextrin (β-CD, host) with (η5-cyclopentadienyl)tricarbonylmanganese [MnCp(CO)3, guest] was obtained in a crystalline state. The host-guest compound is thermally stable and do not liberate the guest on heating at 100$ in vacuum. It was characteried by elemental analysis,1H NMR, differential scanning thermal (DSC) analysis and TLC. Continueous variation plot by NMR method shows that β-CD formed 1:1 inclusion compound with MnCp(CO)3. On the basis of 1H NMR spectra and the model building with Corey Pauling Koltum (CPK) models, the most probable inclusion mode is proposed. The supramolecular inclusion compound of β-cyclodextrin (β-CD, host) with (η5-cyclopentadienyl) tricarbonyl manganese [MnCp (CO) 3, guest] was obtained in a crystalline state. The host-guest compound is thermally stable and do not liberate The guest on heating at 100 $ in vacuum. It was characteried by elemental analysis, 1H NMR, differential scanning thermal (DSC) analysis and TLC. Continue variation variation by NMR method shows that β-CD formed 1: 1 inclusion compound with MnCp ( CO) 3. On the basis of 1H NMR spectra and the model building with Corey Pauling Koltum (CPK) models, the most probable inclusion mode is proposed.