An output driver of an electronic paper display device includes M number of output driver sections configured to transmit M number of pieces of data, respectively, to the electronic paper display device, wherein the M number of output driver sections are divided into a plurality of groups, and are temporally dispersed and driven according to groups, thereby transmitting the M number of pieces of data to the electronic paper display device. Also, an output driver for transmitting data to an electronic paper display device includes N number of drivers, wherein a part of the N number of drivers are selected and driven according to an output impedance of the electronic paper display device. Since output driver sections are divided into groups and are dispersedly driven, peak current is reduced. Since drivers are selectively driven according to the sizes of output loads, a constant driving capability is provided.