[en] The electronic structure of the metallic glasses Fe-B, Fe-Co-B and Fe-Ni-B has been investigated using Moessbauer effect. A comparison with the properties of crystalline Fe-Co and Fe-Ni alloys and T₂B and TB intermetallic compounds (T means 3d transition metals) shows that the electronic structure can be well described in terms of the donor model. The localization of the electronic states is basically determined by the metalloid concentration. An increase in the latter enhances the localization of the electronic states. The electronic structure is not too sensitive to the amorphness of the structure because of the similar short range order of metallic glasses and crystalline intermetallic compounds. (D.P.)