The purpose of this study was to examine the health status of marriage immigrants and naturalized people, their health service utilization and barriers to that in an effort to seek ways of getting rid of their difficulties in health service utilization. The raw data of a 2012 Survey on the State of Multicultural Families were used, and a survey was conducted on 15,001 marriage immigrants and naturalized people from July 10 to July 31, 2012. As a result, the marriage immigrants and the naturalized people got a mean of 3.96 in subjective health status, which showed that they were in good health. The main medical institutions that they used in times of sickness were hospitals and clinics(82.7%). 39.1 percent of the respondents answered they had difficulties in using health service, and the most dominant difficulty they faced at that time was communication problems(52.0%), followed by high expense(28.9%). The respondents who answered they found it most difficult to use health service due to communication lagged behind the others in terms of Korean proficiency, and the respondents who cited expense as the biggest difficulty fell behind the others in terms of living standard. To make health service more accessible to marriage immigrants and naturalized people, the government should take measures to ensure their right of health. Specifically, how to relieve their financial burden should carefully be devised, and medical institutions should provide interpretation service to guarantee their easier health service utilization.