The purpose of this study was to find the frequency of problem behaviors in various types of dementia. The subjects were 112 patients with dementia in patients with dementia the elderly in Seoul. Edwards' (1997) Problem Behavior Scale was used to calculate the frequency of types of problem behaviors. The collected data were analyzed using the SPSS/PC program. The results of this study are as follows : 1. The average age the of subjects was 77.7(range 60-97); number of females 85(75.2%) and males were 28(24.8%). The types of dementis were Alzheimer dementia 69(61.1%); vascular dementia 36(31.9%). mild dementia 22(19.5%); moderate dementia 56(49.5%); severe dementia 25(22.1%). 2. The average frequency of problem behaviors was 2.40 with the most frequent behavior was a disorientation(2.87?1.70). Time disorientation had highest frequency (3.72? 2.22). 3. The significant difference in the frequency of behavior types related to the severity of processing of dementi : mild(1.74?0.54): moderate(2.56?0.80); and severe(2.79?0.96) dementia sowed significant differences of frequency of behavior types(P<0.001). 4. There was a significance in the relationship between the types of problem behaviors : hostility and anxiety(agitation) (r=0.749, P<0.001); anxiety (agitation) and explosive behavior (r=0.603, P<0.001); hostility and explosive behavior(r=-0.525, P<0.001); hostility and depressive behavior(r=0.515, P<0.001). The conclusions are as follows : Time disorientation was significant signal in the dementia patients. Anxiety(agitation), hostility, and explosive behavior had shoud focus on these correlated behaviors. Therefore, nursing intervention of this points.