Logistics performance is significant to apply in relief organization program due to emergency,rnuncertainty and unpredictability of situation. Transportation is a logistics function which enablesrnto achieve fast delivery of material, person and other requirement to the needed place and time.rnTherefore logistics performance is critical in saving life and compliance of donor /standardrnstock holder requirement in humanitarian organization. Although extensive research has beenrnconducted in the area of transportation and logistics performance evaluation. The same canâ€™t bernsaid by directly relating to rental transportation service and its influence on logisticsrnperformance, especially in developing countries like Ethiopia. The purpose of this study isrnaddressing the effect of the third party transportation service on logistics performance. In orderrnto understand the study objective three goal developed and these only focused on identifying thernsignificant variable associated with logistics performance in relation to rental vehicle, examinernthe relationship between use of rental vehicle and logistics performance and determine therneffects of use of rental vehicle on logistics performance .The study was based on one ofrninternational humanitarian organization(GOAL Ethiopia).The research design employed in thisrnstudy isdescriptive using quantitative research methods for data collection. Questionnairesrnwhich include 11 factors and 33 questions distributed to 110 respondents.The findings revealrnthat there is a relationship between use of rental vehicle and logistics performance, and betweenrnvariables selected to measure quality of use of rental vehicle and logistics performance. Thernresult indicates that among the variables satisfaction, cooperation, response time, safety/securityrnand infrastructure have significant effect on logistics performance. More over the study findingrncan be useful for other institutions and researchersrnKey words: Logistics performance, Transportation service, rental vehicle