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Germyl silane ($\{G\_\{e\}\{H\_\{2\}\}Si\{H\_\{3\}$) has been prepared by a new method and its microwave spectrum studied. The following rotational constants have been obtained for the three most abundant germanium isotopes. $B0(Mc/S)Ge703,706.01Ge723,679.90Ge743,655.09$ Spectral intensities are consistent with the very low dipole moment expected for the molecule $(\sim 0.1debye)$. With suitable assumptions for the $SiH3,GeH3$ parameters, the Si--Ge bond distance is found to be $2.358\pm 0.005\backslash AA$. $\mathrm{<mrow\; data-mjx-texclass="ORD">\ast </mrow>}$ This research was made possible by support extended Harvard University by the Office of Naval Research.