Dissertation ( MA Demography)The study on the assessment of the adoption rate of modern contraceptives use for planning among Maasai societies was carried out in Ngorongoro district, within three villages namely Ngorongoro, Nainokanoka and Endulen. Face to face questionnaire, interview and Focus Group Discussion were used in data collection. A total of 96 respondents were involved in the study. The information obtained was then analyzed using the Statistical Package for Social Scientists (SPSS) and qualitative information was analyzed using content analysis. The study findings indicate that, about 50% of Maasai community perceives modern contraceptives negatively. The reasons for negative perception include; health problems like abnormal pain and over breeding during menstruation cycle, the practice is against Maasai cultural norms and also the practice encourage prostitution. Moreover, findings indicate that family planning programs/institutions are not effective on promoting modern contraceptives due to poor response of people on attending these programs/institutions, rumors on side effects as well as partner‟s opposition. Furthermore, a field result indicates the problems associated with modern contraceptive use; such as health problems, poor knowledge on the use as well as sterility. The study concludes that, dispensaries/hospitals play a great part on promoting the modern contraceptive use although there is a great challenge from Maasai cultural norms, therefore the study recommends that health workers should be well equipped with up-to-date knowledge and skills on provision of family planning services particularly on the modern contraceptive use among these communities.