Background: The advantages of breastfeeding are widely documented and in general undisputed. The studies showed different breastfeeding pattern and also there was no information about breastfeeding continuation in the study area. This study was conducted to estimate breastfeeding continuation and its associated factors.Material and methods: An existing data study was carried out to estimate the duration of breastfeeding and its associated factors in Zahedan. 2007 children 2-6 years in Zahedan health centers were studied using health records from 1998 to 2001. Breastfeeding duration and some associated factors such as parents' age, education, and job and child's sex, birth rank, birth weight, and the time of the onset of supplementary feeding were collected.Results: …. nine percent of women initiated feeding babies with breastfeeding. It was 91.6%, 81.7%, 54.4%, and 2% in the months of 6, 12, 18, and 24 respectively.Breastfeeding related to maternal age, birth rank, birth weight and the timing of the onset of supplementary feeding. There was no relation between breastfeeding and parents' education and job, child sex, and delivery type. During the past four years breastfeeding has dropped off significantly.Conclusion: It is necessary to have planning to maintain and to promote breastfeeding based on modifiable factors.