In this study the behavioral characteristics of adult pedestrians when crossing a crosswalk were observed to identify factors linking age and victims of pedestrian traffic accidents, as shown in a previous study.　From August to October 2009, a total of 303 adults were observed using two separate pedestrian crossings in Oita and Beppu cities respectively.　The crossing in Oita was controlled by a pedestrian light, and the one in Beppu was not.　Firstly, the data was analyzed using Fisher’s exact test (extended).　The results showed a significant difference according to age, in ability to cross within the allocated time and adaptive speed control.　Secondly, multiple correspondence analysis method was used to plot the data on x and y axes.　This showed age to be a significant factor.　The criteria for the axes was then developed as follows: x＝attention and inattention ; y＝declining physical condition and recklessness.　Both characteristics of inattention and decline in physical condition were most populated by the group of 65 years and older.　The results suggest that inattention caused by mental and physical decline in senior pedestrians are causal factors in them being the highest group of victims of pedestrian traffic accidents.