Background and aims: One of the common problems in patients undergoing lumbar disc surgery is pain, which leads to undesirable consequences in some patients. The use of analgesics is the most common intervention in relieving pain, which can have complications for the patient. Therefore, the use of non-pharmacological pain relief methods, such as foot massage, is used to reduce pain in patients. The aim of the current study was to investigate the effect of foot reflexology massage on pain of patients undergoing lumbar disc surgery. Methods: This interventional study was performed on 60 patients undergoing lumbar disc surgery, 2017. Patients after selecting, they were randomly divided into intervention and control groups. The intervention group from the second to fourth day after lumbar disc surgery and after at least 4 hours of receiving the last pain relief, foot reflexology massage for 20 minutes and 3 sessions (once a day). It was done by a physiotherapist trained the reflexology method. In the control group, only routine treatments continued. Also, once a day without applying any pressure on the points mentioned, both patient's feet oiled with baby oil that no odor and no color and no analgesic effect. Data were collected using a demographic questionnaire and VAS pain questionnaire. Data were analyzed using SPSS software, ANOVA, Chi-square, Independent t-test, and paired t-test. Results: The mean age of the patients in the experimental group was 59. 43± 8. 16 years in the age range of 44 to 77 years, the mean age of the control group was 57. 56± 9. 19 years in the age range of 39 to 77 years. The two groups did not differ significantly in age, sex and body mass index (P>0. 05). According to the results, in both groups, the intensity of pain after intervention, on the second, third and fourth day, significantly decreased. However, the mean in decreasing pain intensity in the experimental group was higher than the control group (P>0. 001). The mean pain severity after the intervention in the second, third and fourth days in the experimental group was significantly lower than the control group (P>0. 001). Conclusion: The findings of this study showed that foot reflexology massage significantly decreased the pain intensity of patients undergoing lumbar disc surgery, which it can be used as a branch of complementary medicine to reduce the pain of these patients.