Provided are a window member for a display device of a portable terminal and a method for fabricating the window member. An inner surface of the window member is formed as a flat surface from a first end portion to a position adjacent to a second end portion, and an inner surface of the second end portion is formed inclined with respect to the flat surface in a direction toward an outer surface. According to the window member and the method for fabricating the same, shrinkage is minimized during hardening of melt resin by sufficiently delivering injection pressure for the melt resin over the entire molding space of a mold, thereby improving a product defect rate.