A mask frame assembly through which a deposition material to be deposited on a substrate passes, the mask frame assembly includes a frame including an opening, and a mask having first and second ends in a length direction thereof coupled to the frame, in which the mask includes a main body part having a first thickness and including a pattern part, the pattern part including pattern holes through which the deposition material passes and a support part having a second thickness greater than the first thickness and extending away from first and second ends of the main body part.