The concept of Asan Indoor Swimming Pool is to form an image of a dynamic single mass that drifts along the side of Omokcheon Stream by focusing on the longitudinal axis of the building. We proposed a pleasant and fancy space distinguished from other swimming pools by applying variable planes that can accommodate various occasions including the National Sports Festival and everyday use by ordinary citizens and the wall design made of wooden louver and Barrisol to the lobby, which incorporates two floors into a large open space.