The present invention discloses an indenotriphenylene-based diamine derivative is represented by the following formula (1), the organic EL device employing the derivative as hole transport layer, electron blocking layer and fluorescent emitting dopant of emitting layer can display good performance like as lower driving voltage and power consumption, increasing efficiency and half-life time. wherein Ar1, Ar2, L, X, m, n, p, q, r and R1 to R5 are the same definition as described in the present invention.