AbstractDiabetes mellitus is a major public health problem in Morocco. The value ofethnobotanical information is now increasingly acknowledged. To inventory andto provide ethnobotanical information on some of the medicinal plants used intraditional medicine to treat diabetes in Rabat (Morocco), a survey was undertakenfrom March 1st to April 30th 2018. This survey was conducted using a semistructuredquestionnaire targeting diabetic patients from the SOS Diabetes Center.334 diabetic patients were interviewed. Of this group, 53.6% (34 men and 145women) use medicinal plants to control their diabetes. 47.2% have type 2 diabetesand 52.5% have type 1diabetes. Thirty plant species belonging to 18 botanicalfamilies were recorded for the treatment of diabetes. The most represented familieswere Lamiaceae with 8 species followed by Fabaceae with 3 species. Based on thehighest number of users, the most important species were Trigonella foenumgraecumL. (15.4%), Salvia officinalis L. (13.3%) and Olea europaea L. (10.8%).Leaves (47.5%), seeds (20.2%) and stem (17.6%) were the parts predominantlyused to prepare the formulations, which were mainly infusions (50.9%),administrated by the oral route (98.9%). Some plants were used only by type 1diabetics while others were used by type 2 diabetics. The observed adverse events