A deposition mask includes a mask film including a polymer, a plurality of first deposition openings defined in the mask film. and a conductive layer which is on the mask film and receives a power. The conductive layer includes a first conductive pattern and a second conductive pattern spaced apart from each other along the mask film and electrically disconnected from each other. The conductive layer receives the power at the first conductive pattern and the second conductive pattern, and receipt of the power at the first conductive pattern and the second conductive pattern provides an electrostatic chuck function of the deposition mask.