A 10-year follow-up is presented of 484 patients who made serious suicide attempts. Of this group 23% had died, 9% from natural causes, 3% from accidents or from uncertain causes, and 11% from suicide. Suicide frequenzy is highest in the period immediately after the suicide attempt. Especially interesting is the distribution according to sex. During the first 5 years there is a preponderance of male suicides (which is in agreement with the findings of other investigators), but after 10 years this difference in sex disappears. Suicides are found especially among men from 50 to 60 years of age, disabled pensioners, and persons who have attempted suicide several times, and to a lesser degree among persons living alone and criminals.