Provided are a mask assembly and a method of fabricating the same. The mask assembly includes a mask frame in which a frame opening is formed therein and insulation grooves are formed at both sides of a first direction with the frame opening therebetween. The mask has both ends disposed at the both sides and includes a plurality of pattern open parts configured by a plurality of pattern openings between the both ends. A movement member is provided in the insulation groove, to which the both ends of the mask are fixed, and which includes a movement block moving in the first direction and a second direction intersecting the first direction.