Introduction: Post dural Pucture headache (PDPH) Particularly Following Caesarean Section is a well-known iatrogenic complication of spinal anaesthesia mostly occours due to loss of cerebrospinal fluid (CSF) during the procedure. Aims and Objectives: The study was planned to assess comparative superiority of 27 gauze spinal needle over 25 gauze spinal needle in caesarean section for reduction of PDPH. Material and Method: The study was conducted in department of anaesthesia, H.N.B. Base teaching Hospital Srinagar Garhwal Uttarkhand, in which a total of hundred full term primi-parous women aged within 18-36 years undergoing elective Caesarean Section were selected. They were divided into two groups. Group A (n=50) Receive spinal anaesthesia with 25 gauze spinal needle. Group B (n=50) Receive spinal anaesthesia with 27 gauze spinal needle. Study Design: A randomized study Exclusion criteria: History of previous Caesarean Section or lumbar puncture due to any cause, multiparous, and need emergency Caesarean Section, patient with abnormalities of spine. Data collection were done focusing incidence of PDPH, onset, site, duration and severity of the headache post operatively. Intraoperatively, difficulty in localizing the subarachnoid space and required time taken to administer spinal anesthesia were also recorded. Results: The overall incidence of PDPH of 100 CS patients was 17% and significantly higher incidence is noticed in-group A than group B (26% vs 10%, p <0.05>). Attempt required to attain CSF is higher in group B and finer needle takes significantly more time to collect CSF (P<.001). Mean Duration for CSF Collection was 35.08±13.43 seconds (group A) and 81.12±16.71 seconds (groups B) Conclusion Use of 27G spinal needle will be a good choice for reduction of PDPH.