A transparent electrically-conductive film comprising a substrate made of an aliphatic polyimide having a repeating unit of the formula [I] and a transparent electrically-conductive thin film layer, the transparent electrically-conductive thin film layer being provided on the substrate, ##STR1##

• wherein R is a tetravalent aliphatic group having 4 to 39 carbon atoms and is a divalent aliphatic group having 1 to 39 carbon atoms or a divalent aromatic group having 6 to 39 carbon atoms;

  an organic EL element using the above film; a thin-film transistor substrate comprising a substrate formed of a film of a polyimide having a repeating unit of the formula [I] and, provided thereon, a thin-film transistor; and an organic EL element using the above transistor substrate.