A polyhedral germane, 4,8-dichloroocta-t-butyltetracyclo[3.3.0.02,7.03,6]octagermane, was prepared by reductive reactions of either 1,2-di-t-butyl-1,1,2,2-tetrachlorodigermane or t-butyltrichlorogermane with lithium naphthalenide. The structure of the new compound was determined by X-ray crystallographic analysis as well as by NMR spectra.