The purpose of this study was to investigate the natural ventilation methods using stack ventilation in offices. Natural ventilation is one of key factors to compose low energy and healthy buildings. Mechanical cooling and ventilation load can be dramatically reduced by natural ventilation and this is occurred by stack ventilation through solar chimney and atrium. The world famous sustainable office buildings to use stack ventilation were categorized into two types: "solar chimney" and "atrium". The investigation shows that stack ventilation heavily relies on shading component and operable windows of exterior skin, precooling of intake air, location, height and materials of chimney and composition of atrium space. Finally, the space composition models for solar chimney and atrium are proposed based on the case analysis and the effectiveness of stack ventilation is verified by CFD simulation as the space composition is the basis for stack ventilation.