Internationally, the Korean feature-length animation is not making a successful box office hit. Being a box office hit all around the world is related with entertainment and laughter cannot be excluded as a element that gives such enjoyment. Although the humor would be playing an important role in globalization of Korean animation, studies that analyzed humor in Korean and U.S. animation are still lacking. Recently, there are cases that several Korean animations aim at overseas market entrust pre-production of scenario or storyboard. This paper examines the humor embedded in stories of feature-length animations that had the most differences by analyzing frequency and contents, and through interviews. It also proposes ways to improve the humor embedded in stories of Korean animations.