The purpose of this study was to assess the practice and challenges of cooperative training inrnsome selected private health science TVET colleges in Addis Ababa City Administration. Arndescriptive quantitative and qualitative research design was adopted for this study. Data wasrnobtained through questionnaire, interview and observation. Purposive sampling method wasrnapplied to select health science TVET college deans or vice deans. Sample trainee and trainersrnwere selected first using stratified sampling to be able to include trainees and trainersrnparticipants from the departments available. Then proportionate sampling was employed tornroughly ensure the representation. Among the distributed questioners, 218 (94.9%) trainees,rn20(83.3%) trainers and 40(87%) health sector trainers (mentors) of the questionnaires wererncompleted, returned, and used for the study. For the deans/vice deans and coordinators interviewrnwas used to collect the data. The major findings of the study indicated that, the health sectorsrnawareness about the purpose of cooperative training system in Addis Ababa City Governmentrnwith respect to: weak attention was given for cooperative training follow-up and monitoring; thernavailability and utilization of training contract, and memorandum of agreement in cooperativerntraining providing health sectors was not satisfactory; training plan based on OccupationalrnStandard is neglected. Finally, the study recommended that there should be a strong closernsupervision by the Health Bureau and TVET agency for the health TVET colleges and the healthrnsectors to focus on cooperative training which can be improved through awareness creation ofrnthe benefits they could derive from the process