Background Pregnancy is an event that involves many physiological and psychological changes. Pregnancy is also a complex phenomenon that also causes strong psychological and social changes, especially in first-time mothers. One of the psychological changes is anxiety, which tends to have a negative impact on the mother and fetus. Material and Methods The method used in this study was a quantitative experiment with one group pretest-posttest without a control group. The questionnaire to determine the level of anxiety used the Hamilton Anxiety Rating Scale (HARS) which was given before and after treatment. This research was conducted at the Sambau Public Health Center, Batam City, Indonesia. The sample used in this study was a non-probability sampling technique with the type of purposive sampling selected by the researcher. The number of samples was 15 pregnant women according to the inclusion criteria, namely first trimester III pregnant women without complications. Pregnancy exercise is carried out for 4 weeks with an interval of 2 times a week with a duration of 60 minutes. The data analysis technique used t-test with the first formality test using the Shapiro-Wilk test technique. Results Previous research showed that the average anxiety of pregnant women in the third trimester before pregnancy exercise was 60.33, and the moderate anxiety of pregnant women in the third trimester after being given pregnancy exercise was 47.53. This means that there is a change or decrease o,f 12.8. Statistically with the paired t-test, the tcount value was 7.388 and p-value = 0.000, which means pvalue < (0.05). Conclusion Thus, the provision of complementary care for pregnancy exercise has an effect on reducing anxiety at the Sambau Health Center, Batam City, Indonesia