Background: Unmet need for family planning is similar sometimes even higher among womenrnliving with HIV. There is also a significant number of unintended pregnancies ranging from 51rnpercent to 84% among HIV-positive women. In Ethiopia, the prevalence rate of LAPMs amongrnthe general population has shown an increment. The use of implant recently has increased fromrn12% to 16%.rnObjectives: The objective of this study is to assess the demand for long acting and permanentrncontraceptive method and factors associate with it among HIV-positive women enrolled onrnantiretroviral treatment program in public hospitals in Addis Ababa, Ethiopia.rnMethods: A facility based mixed methods research combining quantitative cross sectional studyrndesign and qualitative research was carried out in Addis Ababa among HIV-positive womenrninitiated ART. A sample size of 421 was calculated and distributed to the selected hospitalsrnbased on the number of ART clients each have. A structured and pre- tested questionnaire wasrnused to collect the data. Data collection was under taken from March2- April 20 2014 for bothrnqualitative and quantitative study. The qualitative study was conducted in the same hospitals.rnBinary logistic regression and multivariate analysis were employed using SPSS version 21.rnResult: A total of 394 HIV positive women who initiated ART were included on the study withrnthe response rate of 93.6%. The total demand for LAPMs among HIV positive women on ARTrnwas 60.2% (95% CI 55-65) which was 14% for met need and 46.2% unmet need. Factorsrnassociated with demand for LAPMS were number of live children (AOR 0.188 95% CI 0.074-rn0.476) and disclosure of HIV status to family members (AOR 0.400 95% CI 0.227-0.750).rnNumber of live children (AOR 0.100 95% CI 0.032-0.311), marital status (AOR 0.405 95% CIrn0.169-0.968, disclosure of HIV status to family members (AOR 0.339 95% CI 0.182-0.631) andrnsatisfaction with cost of method (AOR 0.438 95% CI 0.221-0.867) were predictors of unmetrnneed. The qualitative study findings also supported the above result where the participantsrnexplained that family members usually interfere in the womenâ€™s decision to use LAPMs.rnConclusion and recommendation: The study shows the high total demand and unmet need forrnLAPMs, which may increase the mother to child HIV transmission due to unintendedrnpregnancies caused by the failure of other short acting methods. Unmet need for LAPMs ofrncontraception can be addressed by proper training of service providers (Both ART and FP),rnbetter counseling skill on family planning and proper management of side effects.