The Purpose of this study was to investigate development of anxiety in adult years. The Stale-Trait Anxiety Inventory was administered to 1234 men and women from a representative community sample with their ages ranging from 25 to 92 years old. It was found that anxiety declined linearly throughout the adult lifespan. Sex difference was also observed in trait anxiety, with women showing higher anxiety than men. Men's professions had effects on males while did women's education on females. Development of anxiety and differential effects of background factors on anxiety between sexes were discussed with relation to personality development.