Provided are a thin film transistor and an organic electrolumienscent display including the same. The organic electroluminescent display includes: a gate electrode; source and drain electrodes that are insulated from the gate electrode; an organic semiconductor layer that is insulated from the gate electrode and electrically connected to the source and drain electrodes; an insulating layer that insulates the gate electrode from the source and drain electrodes or the organic semiconductor layer; and an electron withdrawing layer composed of a Lewis acid compound formed between the source and drain electrodes and the organic semiconductor layer. Charges can easily accumulate so that a channel doping effect occurs in the semiconductor layer, thus preventing the formation of an energy barrier and increasing the number of carriers that are injected into a channel. As a result, a TFT having a low contact resistance, an large number of injected carriers, and good charge mobility can be obtained. A flat panel display including the TFT is reliable and has low power consumption.