Every year, approximately 536,000 maternal deaths occur in the world due to pregnancy related complications; of which over 95% occur in sub-Saharan Africa and Asia. One explanation for poor health outcomes among women in these countries including Ethiopia is the low utilization of ANC & delivery care services by a large proportion of women. So, the study was aimed to assess factors influencing utilization of antenatal and delivery care services in Burji special woreda, SNNPR, Ethiopia. A community-based cross sectional study was conducted in the woreda from March 1-30, 2011. The study included 1 urban and 8 rural kebeles with a total sample size of 773 respondents and 40 discussants for four FGDs. The study revealed that the proportion of women who received ANC was 55.6%. Only 16.4% mothers delivered at health institution and only 15 % of total delivery was attended by skilled birth attendants. Residence, monthly income and maternal education were major determinants of ANC service utilization and residence, maternal education and ANC attendance were determinants for delivery care service utilization after adjusting for other variables.