The available scholarship does not learn the economic diplomacy implication of Ethiopia's regional peace and security role. In this regard, this piece attempts to shed some light on the issue. Accordingly, it founds out that Ethiopia's regional peace and security role negatively but slightly impact the economic diplomacy in the short term; yet, its positive implication outweighs in the long-term. Furthermore, the study concludes that though Economic Diplomacy is the center-piece of Ethiopia's Foreign Policy, its success in the Horn of Africa is not adequate. However, the prospect of Ethiopia's economic diplomacy in the region is positive, given that there is concerted action, unrelenting effort to invest in the region, and a well-built awareness of the region's untapped opportunities. Overall, this piece can be used as reference material or background information for those who have the interest to conduct any further inquiry on the issue.