The purpose of this study was to examine the effects of social support on the role conflicts and marital satisfaction of dual-career commuting couples. Ninety-three dual-career commuting couples were participated in this study. The results were as follows: (1) Wives received more informational support than their husband. Wives also received more support from their family of origin. (2) For wives, instrumental support from their family of origin and friends reduced their role conflicts. (3) For both wives and husbands, wives family of origin played most important role among social network. (4) Social support from friends and colleagues had significant effects on role conflicts and marital satisfaction of dual-career commuting couples.