Postoperative pain relief is crucial to ensure patient comfort, make early mobilization possible and hasten recovery. Perioperative morbidity can be efficaciously reduced with good postoperative pain management. Lumbar spine surgery in particular is frequently associated with severe postoperative pain. Erector Spinae Plane Block (ESPB), a new truncal fascial block technique was introduced to target the posterior root of the spinal nerve. Methodology- A Randomized double blind controlled study conducted at tertiary care centre involving 80 patients who were scheduled to undergo lumbar spine surgery satisfying inclusion criteria were included in the study. With the help of the SNOSE technique, patients were randomly assigned into two equal groups. The ESP group received ESPB with 20 ml of 0.25% bupivacaine which was injected under USG guidance on both sides while the group C did not receive erector spinae block. Results- Mean time for first rescue analgesia in Erector spinae plane block group was 7.73 ± 0.87 hours and in the control group it was 6.10 ± 2.274. There was significant difference in time for first rescue analgesia between the groups. In ESPB group, 10% required additional rescue analgesia and in control group 27.5% required additional rescue analgesia. Conclusion- ESPB block has also proven to provide good pain relief until the first 6 hours post-surgery with significantly lower VAS scores.