Background: Regular mammography is important for early detection of breast cancer (BC). Women in developing countries haven't regular mammograms. There is little information about why women do not maintain regular screening schedules. Objectives: To examine participation in regular mammography screening of women applying to cancer early diagnosis, screening and training center and identify which factors are associated with those women who participate in screening. Methods: In the study, whose scope is cross-sectional, the archive files (14027 file) of the women applying to cancer early diagnosis center in between the years of 2004 and 2011 were evaluated. We accepted to be inclusion criteria if archives files had mammogram results. In all tests, the level of significance was set at 0.05.