When urban spaces are classified into two types “grid” and “non-grid” by their street pattern, many people think that a grid street pattern makes it easier to find one’s way than a non-grid street pattern. However, while people stroll in urban areas for shopping or for sightseeing, etc., it is more important to recognize the ways to go than to have a precise cognitive map. This study investigates the effects of street patterns on the wayfinding by the experiment which conducted in the two actual urban districts, one has a gird street system and the other has a non-gird street system. There were twenty-eight participants (age 19-25). Fourteen participants walked in a residential district which has a gird street system (hereafter referred to as “the grid district”) and the other fourteen participants walked in a district area which has a non-grid street system (hereafter referred to as “the non-grid district”). Both districts are located in the Tokyo, Japan. The experimenter showed the participants a specific path from a specific origin point to a specific destination point. After they learned the path, the experimenter showed the photos of the intersections or the intersections at the actual location. Some of these intersections are on the path and some are not. The participants were asked to answer whether they passed the intersection or they did not. Results : The participants of the non-grid district answered much more correctly than those of the grid district. In particular, the participants of the non-grid district answered the intersections which they did not pass with more confidence than those of the grid district. The participants of grid district did not recognized some intersections which they actually passed. Nineteen Participants (age 19-26) learned a path in the same way as in the Experiment I. The paths were also same as in the Experiment I, however the directions of it were inverse of it in the Experiment I. After they arrived at the destination, they were requested to trace backward it, i.e. from ‘the destination point’ to ‘the origin point’ for themselves. As they walked, the experimenter followed them and took motion pictures. After they arrived at the origin point, they filled out a questionnaire. Each participant walked both of the paths in the grid and non-grid districts. Results : There was no significant difference in the attainment of reaching the origin point between in the grid district and in the non-grid district. However the participants of the grid district stopped more often and longer time than the those in non-grid district. In the grid district, the participants tended to use the information in their cognitive map, such as the direction to the origin point and number of blocks they had passed. On the contrary, the participants of the non-grid district memorized and used the views, the objects and the landmarks on the path. The views and the objects in the street can be used more to find the way to go in non-grid districts than in grid districts. In contrast, the direction to the destination on the cognitive map and number of passed blocks are useful in grid districts. However, this type of information needs a series of memories which are obtained at more than one spot on the path and needs for people to connect each other and translate to the information to decide the way to go. This process can be a heavy burden for people. The failure of this process makes people to stand for long period of time at intersections to find their way to go in the grid district. According to the result of this study, when people stroll in urban areas, they can find their way and memorize their way easier in non-grid districts than in grid districts.