This study mainly explored significant others’ social support of the elderly from twofold dimensions, namely quantity versus quality of the support, and actual versus ideal support. And this study also aimed at examining the relationship between social support and the elderly attitudes toward aging. There were 441 old adults participated in this investigation. Significant Others Scale (SOS) and Attitudes to Aging Questionnaire (AAQ) were applied to assess social support and the attitudes to aging perceived by the participants. The results showed that: (1) the distribution of support sources was in accord with the hierarchical compensation model. (2) Gender, age and educational level showed significant effects on social support perceived by older adults. (3) If the elderly perceived higher quality of social supports from his/her significant others, he/she would report more positive attitudes toward aging.