Emesis gravidarum is a condition that can cause weight loss, impaired body metabolism, malnutrition, weakness, and dehydration felt by the mother. Peppermint aromatherapy administered by inhalation can be a therapy that is able to overcome or eliminate nausea and vomiting in the first and second trimesters of pregnant women. The purpose of this study was to determine the effect before and after administering peppermint aromatherapy on the incidence of Emesis gravidarum in the first and second trimesters of pregnant women. This study was pre-experimental research with one group pretest-posttest design. The sampling technique used was accidental sampling consisting of 20 pregnant women in the first and second trimesters. Data was collected using observation sheets and PUQE-24 questionnaires. The results showed that the average value of nausea and vomiting before being administered peppermint aromatherapy was 8.15 (moderate category) and after being administered peppermint aromatherapy was 4.80 (mild category) with a difference of 3.35 and a significance value of 0.001 (p<0.05), statistically there was a significant difference in the mean of nausea and vomiting after being administered peppermint aromatherapy intervention. This study is expected to provide an overview of the importance of maintaining nutrition during pregnancy so that mothers are avoided chronic energy deficiency and prevent the long-term effects of emesis gravidarum. Mothers are expected to be able to independently implement the use of peppermint aromatherapy as an effort to reduce nausea and vomiting by using easily available ingredients.