Paravertebral block, both single injection and continuous infusion, has been reported to be comparable to thoracic epidural with regard to analgesia while avoiding the possibility of hypotension and urinary retention in the postoperative period. Despite these advantages, it should be noted that percutaneous paravertebral catheter placement carries the same contraindications with regard to anticoagulation as epidural analgesia. The use of elastomeric infusion devices with larger volumes of local anesthetic has been demonstrated in a recent retrospective review comparing patients receiving continuous local anesthetic infusion both subcutaneously in the wound and at the intercostal nerves with patients receiving epidural analgesia. Hence the present study was planned for Comparative Administration of Continuous Paravertebral Infusion of Ropivacaine with and Without Fentanyl for Pain Relief in Unilateral Multiple Fractured Ribs Patients. The present study was planned in Department of Anesthesia, Anugrah Narayan Magadh Medical College, Gaya, Bihar. The study was conducted from August 2013 to April 2014. Total 20 patients with unilateral fractured ribs and visual analogue scale (VAS) pain score greater than 30 mm were enrolled in the present study. The 10 cases were enrolled in Group A patients received infusion of Ropivacaine 0.375% with adrenaline 5 µg/ml. The Group B patients received the infusion of Ropivacaine 0.2 % with adrenaline 5 µg/ml and fentanyl 2 µg/ml. The data generated from the present study concludes that Both drug combinations used for paravertebral infusion in the present study, i.e., ropivacaine 0.375% with adrenaline 5 µg/ml and ropivacaine 0.2% with adrenaline 5 µg/ml and fentanyl 2 µg/ml, provided good analgesia with minimal side effects in patients with unilateral MFR. Addition of fentanyl in low concentration i.e., 2 µg/ml to the combination of ropivacaine and adrenaline allowed reduction of ropivacaine requirement without affecting the analgesic efficacy or the incidence of opioid-induced side-effects.