Assembled metal complexes, where organic pi electrons and metal d electrons coexist, form one important class of materials in the field of molecular "metals" and "superconductors". Among them. molecular conductors based on metal-dithiolene complexes are known to exhibit various conducting properties. Recent studies on molecular conductors based on the acceptor-type Pd(dmit)(2) [dmit=2-thioxo-1,3-dithiol-4,5-dithiolate] and the donor-type Ni(edo)(2) [edo = ethylenedioxydithiolate] and related materials are described.