There is a low proportion of HIV positive individuals who disclose their HIV positive status totheir sexual partners globallyranging between 16.7 - 46%. This results into poor adherence and poor appointments keeping, ART treatment failure with subsequent increased morbidity and mortality among HIV positive breastfeeding women and their HIV exposed babies. This would undermine the global goal of zero new HIV infections. This study sought to determine the prevalence and factors associated with disclosure of HIV status to sexual partners among HIV positive breastfeeding women attending eMTCT clinics in Jinja district. About a half of the HIV+ breastfeeding women had ever disclosed their HIV serostatus to their sexual partners. Being born again, single, having separated/divorced from the sexual partner were associated with a less likelihood of disclosure of HIV serostatus to their sexual partners. Results from qualitative research showed that the fears in their relationships prevented the HIV positive breastfeeding women from disclosing their HIV status to the sexual partners.