An influence of geometric road condition and land-use of roadside on traffic accident was investigated based on 552 traffic accident occurred in a road section specified as a black spot by the Ministry of Land, Infrastructure and Transport. The road section of investigation was the 32.1-33.3 kp of National Road 190 and this section was anomalistic wide straight 2-lane road and some large store located by the roadside. The analyzed data were recorded and restored by Yamaguchi Police Department during 1995-2003. A malign influence upon traffic safety of such irregular road width and markings, and access traffic of roadside store were examined and discussed.