Purpose: Listening to music has been used as an intervention during the treatment and the rehabilitation processes. Cardiac surgery is a stressful and fearful for most of the patients. This randomized and controlled trial has assessed the effect of listening to music on the level of surgical fear and anxiety of the patients, who had undergone a cardiac surgery. Methods: This randomized controlled trial consisted of 50 patients in the intervention group and 50 patients in the control group. Two days before the surgery, the intervention group listened to music for about 45 minutes each day (45 min on average). The control group received no music intervention. Patients’ anxiety and surgical fear were measured using the State-Trait Anxiety Inventory and Surgical Fear Scale. Results: It was found that the fear and anxiety levels of the experimental patients who listened to music were lower than the control group, and the difference between the mean anxiety and surgical fear scores before cardiac surgery were statistically significant between the intervention group and control group. Conclusions: It is possible to implement a music listening program in the perioperative time and is well accepted by patients as evidenced by the low anxiety-surgical fear scores. Listening to music as an intervention for patients, who undergone cardiac surgery was feasible. Intervention was highly effective in reducing anxiety and surgical fear levels.