Background: Anxiety is commonly seen in the preoperative setting. Preoperative anxiousness is widely documented to have a deleterious influence. Anxiety is heightened in the case of gynecological surgery because the intervention can have disastrous consequences for a woman's body image, sexuality, and psycho-affective well-being. Music listening is becoming more popular as an alternative therapy for reducing preoperative anxiety. Personal tastes, familiarity, and popularity may be important factors in achieving the best relaxing reaction to music. The purpose of this study was to see if listening to self-selected music reduces preoperative anxiety in women going for gynecologic surgery versus predefined music from an application. Methods: The research design used Pre experimental one group pretest post-test design, with a purposive sampling method. The subjects of this study consisted of 60 patients with Breast cancer undergoing surgery. The measurement of anxiety intensity uses the anxiety scale which is analyzed using the Paired t’ test statistical test. The results showed that the entire study sample experienced a decrease in anxiety intensity scores in undergoing Breast cancer surgery treatment after being given music therapy. Result: In this study, post test 55% of breast cancer patients have minimal anxiety and 5% have mild anxiety. Educational status were the factors that significantly affect music therapy to reduce anxiety level p value less than 0.05. Conclusion: Despite the fact that more than half of Breast cancer surgery patients 55 percentage of patient minimal anxiety. Music therapy is effective for the patient reducing anxiety.