The main purpose of this study was to assess the contribution of NGOsrnassistance in improving quality of primary education; the case of AddisrnAbaba city government. To this end, mixed methods approach morernspecifically a descriptive survey research method was employed tornconduct the study. Data were gathered from 139 teachers, 20 principals,rneight CRC coordinators, five. education officials (four at four sub-cities andrnone at AAEB) and eight representatives of program providers of NGOs,rnwhich were selected through random, availability and purposive samplingrntechniques. The data collected through questionnaires were analyzedrnusing percentage and weighted mean and the qualitative data werernanalyzed in narration. The findings of the study revealed that improvingrnphysical accesses, resources and the. in-service teacher trainings hadrnsignificance contributions in. improving teachers' professional competencernand the teaching learning process as a whole. From this it can bernconcluded that NGOs had significant contribution in improving quality ofrnprimary education in Addis Ababa. Finally, it is suggested that more hasrnto be done in improving qu·ality of primary education on the governmentrnpart together with different NGOs willing to work on the educationalrncenter .