The purpose of this study is to find effective design elements to make maps easy to use for people with poor directional ability. We conducted comparative experiments using 12 types of existing maps. 58 subjects tried to find their ways using several maps in large spaces such as shopping malls and stations with rather complex structures. After observing their behaviors, we conducted interviews to clarify supportive design elements of maps to find ways. As a result, we found some effective design elements such as vivid color tones, the right angle of bird's-eye-view, the right degree of deformation of illustrations, readable design from upside down position when maps are rotated, for example. We also found two important requirements of map design; (1) landmarks on maps should be easily collated with real landmarks, (2) relations between different stories of the building should be clearly described.