This study aims to determine the effect of the Alexander technique on the comfort level of pregnant women in the third trimester. This research uses a quasi-experimental design approach with a pretest-posttest design with a control group design. The paired sample t-test analysis results showed that there was a difference in the average level of comfort in the intervention group before and after being given the intervention with a p-value of 0.000. In the control group, a p-value of 0.282 was obtained. This indicates that there is no difference in the level of comfort before and after. The results of the GLM-RM test showed that the greenhouse-geisser (Sig) value was 0.000 < 0.005, and the most significant partial eta square value was in the 7th measurement (0.454). In conclusion, the alexander technique can increase comfort in third-trimester pregnant women.   Keywords: Third-Trimester Pregnant Women, Comfort, Alexander Technique