Background: A woman's satisfaction with the delivery service may have immediate and long term effects on her health and subsequent utilization of the services. Providing satisfying delivery care increases service utilization. Women play a principal role in the rearing of children and the management of family affairs, and their loss from maternity-related causes is a significant social and personal tragedy.Objective: To assess maternal satisfaction with the delivery service in Assela hospital, Arsi zone, Oromia region. Methods:A cross sectional study was conducted in February 2013 on a sample of 398 delivering mothers in Assela Hospital using convenient sampling technique. Data was collected using structured questionnaire and analyzed by SPSS version 17. Statistical tests were employed and significance level was taken at p-value<0.05. Results:A total of 398 delivering mothers were interviewed, of which 64.6% of the respondents were between the age group of 20-34 and 48% were house wives. The findings of the study showed that the overall maternal satisfaction level with the delivery services rendered at the hospital was 80.7%. Dissatisfaction was reported to be highest (42.3%) by cleanliness and access of toilet. Furthermore, satisfaction with the delivery service was found to have a significant association with the age of the respondents 20-34 [AOR=4. 65(2.35, 9.20)] and educational level of the respondents [AOR = 2.42, 95%CI: 1.17, 5.00)]. Conclusion:Although the majority of participants satisfied by the delivery service given to them during delivery, lack of satisfaction by a minority group resulted in a limited ability to engage in health facility delivery which farther contribute to maternal mortality. Thus, mechanisms should be devised to increase maternal satisfaction in this health institution.