A matrix type flat-panel display device having multi data lines and a method for driving the matrix type flat-panel display device are provided. The matrix type flat-panel display device in which a plurality of data lines are assigned to each of a plurality of columns consisting of pixels and each data line is arranged to correspond one-to-one with pixels to which each scanning line is connected, makes it possible to increase the number of the scanning lines which can be driven at the same time, thereby extending dwell time by multiplying it by the number of the data lines assigned to each of a plurality of columns consisting of pixels.