A substance having a hole-transport property and a wide band gap is provided. A fluorene compound represented by a general formula (G1) is provided. In the general formula (G1), .sup.1 and .sup.2 separately represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms; Ar.sup.1 represents a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted 4-dibenzothiophenyl group, or a substituted or unsubstituted 4-dibenzofuranyl group; n and k separately represent 0 or 1; Q.sup.1 represents sulfur or oxygen; and R.sup.1 to R.sup.15 separately represent hydrogen, an alkyl group having 1 to 12 carbon atoms, or an aryl group having 6 to 14 carbon atoms. ##STR00001##