The present study aims to investigate the relationship between a mother's wisdom and her child's happiness, conducting multiple mediation analyses. More specifically, this study explores whether 4 kinds of maternal child-rearing behaviors affect the child’s happiness in a sample of 379 pairs of elementary school students and their mothers. The major findings are as follows: First, the mother's wisdom was significantly correlated with such three dimensions as affection, fulfillment, and rationality among her 4 rearing-behavior dimensions. But her wisdom was not correlated with the dimension of autonomy. Positive correlations with the child’s happiness obtained among all of the mother's 4 rearing behaviors. Regarding the sub-factors of her wisdom, second, the more sympathetic the mother was in her interpersonal relationship, the more affectionate and rational she was in maternal child-rearing behaviors; when the mother took the more positive attitude towards life, she would more likely reveal autonomous and fulfilling rearing behaviors towards her child; as the mother was more sympathetic in the interpersonal relationship, the child felt happier; and the mother’s affectionate and rational rearing behaviors made the child happier. Finally, the mother’s affectionate and rational rearing behaviors were found to be mediators between her wisdom and the child’s happiness, but her autonomous and fulfilling rearing behaviors were not.