The present invention relates to an orally fast dissolving film formulation including aripiprazole. The orally fast dissolving film formulation includes aripiprazole or a pharmaceutically acceptable salt thereof and an organic acid. The orally fast dissolving film formulation has a pH in the range of 4.7 to 6.0. The orally fast dissolving film formulation may further include a film base polymer. The orally fast dissolving film formulation has a high dissolution rate, causes no risk of damage to oral tissues, masks a bitter taste of aripiprazole, and gives a good feeling upon taking.
