The purpose of this study is to analyze the desirable life emotion and life interchange between lod parents and married children. The focus was particulary laid on the investigation of the life emotion and life interchange between the aged living with their married sons and those living with their married daughters. The major findings of this study can be summarized as follows: 1. More old parents live with their married sons than with their married daughters. Also was found that they live with their eldest married sons or daughters and that they keep a normal relation with their married sons, and an emotional relation with their married daughters. This shows that more old people will live with their married daughters than with their married sons in the future. 2. The facts which affect the realtion between old parents2 2and their marreid children are age, sex, religion, marital status, educational background, health condition. These facts prove that they may improve the life interchange with their married children through such deliberate effects as the life-long marriage life with their spouse, the maintenance of health, and the religious life. 3. The affection relation between old parents and the married children was found to be high and the conflict between them was found to be low. Those who live with their married daughters especially showed a higher rate of love relation, and a lower rate of conflict than those who live with their married sons. The former were of more service interchange to their married children than the latter. Furthermore, the aged people were more satisfied with emotional and kindly daughters than with normal sons. 4. Affection was found to be the most importnat variable in promoting the emotional life interchange, and dependency was found to be a negative variable. Therefore, both the aged and the marreid children should try to show high affection to each other and try not to impose and dependency on the other.