The purpose of this study was to examine the association between participation in leisure sports activities of married couples and marital satisfaction. In order to fulfill such purpose, the population was set as married adults with more than 1 year of marriage, living in Seoul. Using the method of multi-stage stratified cluster random sampling, 600 participants were randomly sampled: 150 participants from a Culture and Sports Center in each of the selected 4 autonomous districts respectively (Gangdong: Gangdong-gu, Gangseo: Guro-gu, Gangnam: Gangnam-gu, Gangbuk: Jongno-gu). Although 583 participants responded, only 567 were used for data analyses because 16 were considered to be incomplete or insincere responses. The survey questionnaire was used to collect the data. The questionnaire to measure marital satisfaction as one of variables in this study was the MSS(Marital Satisfaction Scale) questionnaire; based on Chung(2001)`s research, we have revised Yoo(1991)`s measuring tool which was customized to make it relevant to the Korean socio-cultural environment and which had basically consisted of 48 sentences that Roach et al.(1981) selected according to item discrimination power from the 180 MSI(Marital Satisfaction Inventory) questions that were first developed by Snyder(1979). From the analyses of data, this study found out the following results: First, there were partial differences in marital satisfaction of couples on a basis of socio-demographic characteristic variables. Particularly, marital satisfaction differed according to gender, age, occupation, religion, educational Level, monthly average income, age gap from spouse, duration of marriage, marriage style, and number of children. Second, participation in leisure sports activities of married couples influenced marital satisfaction, the results of this study supported that the sub-variables of marital satisfaction which comprise of companionship, emotion, communication, sexual affection, attitude, and self-consciousness are associated with form of participation and degree of participation.