A thin film transistor substrate and a display apparatus including the same are provided. The thin film transistor substrate includes a plurality of pixels each including: a first transistor for receiving a data signal in response to a first gate control signal; a second transistor for outputting a driving current according to the data signal applied to a gate electrode of the second transistor; and a third transistor for initializing a gate node connected to the gate electrode of the second transistor in response to a second gate control signal, wherein first electrodes of the third transistors of at least some adjacent pixels of the plurality of pixels are connected to the gate node, and second electrodes thereof are connected to a shared transistor that applies an initialization voltage to the second electrodes.