A pre-post test, two-group study was conducted to examine the effects of a culturally competent targeted intervention titled GO EARLY Save Your Life on the breast cancer and early screening-related knowledge and beliefs and mammography use among 180 Korean American (KA) women aged 40 years or older who had not had mammograms within the past 12 months. The intervention group received an interactive education session focused on breast cancer, early screening guidelines, and beliefs (breast cancer-related and Korean cultural beliefs). The control group received no education. There was no statistically significant intervention effect on mammography use between the intervention (34%) and control groups (23%) at 24 weeks post baseline. The rates of mammography use for both groups significantly increased from 16 to 24 weeks post baseline. The education was effective in increasing breast cancer/early screening-related knowledge and modifying beliefs (decreasing barriers, fear, seriousness, and fatalism, and increasing preventive health orientation).