A new condensed polycyclic compound represented by general formula [I]: ##STR00001## wherein R.sub.1 is hydrogen, halogen, cyano, a substituted amino or a group selected from the group consisting of alkyl, aralkyl, aryl, heterocyclic, each having no substituent or a substituent; and Ar.sub.1 to Ar.sub.5 are the same or different and are each independently a condensed polycyclic aromatic group or a condensed polycyclic heterocyclic group, each having no substituent or a substituent is used for an organic light-emitting device that is extremely efficient in a light output with high luminance and is extremely durable.