A demultiplexer, a light emitting display using the same, and a display panel thereof. The light emitting display includes: an image signal line for supplying a data signal for displaying an image through a plurality of first signal lines; a display area including a plurality of data lines for transmitting the data signal, a plurality of scan lines for transmitting a selection signal, and a plurality of pixels coupled to the data lines and the scan lines; a data driver for sequentially outputting a plurality of first control signals; a scan driver for sequentially applying the selection signal to the scan lines; and a demultiplexer including a plurality of switches for transmitting the data signal to at least two data lines in response to the first control signals. One of the first control signals is transmitted in at least two directions to switches in at least one of the switching units.