Objectives: One of the most important challenges for modem societies is the increasing of elder population. Caring these people is also another important matter for health systems. Families do most of caring responsibilities of the elders who face with many problems for meeting the elders' needs. The aim of this study was to determine the problems of families caring a frail elder who came to the clinics of public hospitals in karaj city in 2002.

Methods & Materials: this study was a correlational descriptive research that 90 families were selected through purposive sampling. Data collection tool was a questionnaire. The method of data collection was interview and then filling the questionnaires by the researcher.

Results: findings of the study showed that the age range of elders was 77±9, most of them came to the hospitals for heart diseases. The activity of daily living independency score was 46±5.7. The majority of help and support of elders was done by women. Most of families expressed the social family relationship problems from high to medium level, the leisure activity problems from medium to high level and the economical problems from medium to high level. All of woman expressed doing job problems from high to medium level and most of men expressed these problems from medium to low level. As a whole, women caregivers' problems were more than men caregivers' problems. Also the results showed that, an increase in the elder age, dependency in activity of daily living, mental and cognitive disorders of the elder and the time of physical support of the elder by other members would increase.

Conclusion: this study show, in regards to increasing the elder population in our country special planning must be designed and done as programs for elders and their families. In case of continuity of caring the elders and not supporting these families by health systems, possibility of existing burnout and burden in them will as such so that elder abuse will happen. In spite of these problems in such families, one can prevent sending the elders to nursing homes through supporting them