Abstract: The main objective of this study was to know about prevelance of back pain among physicaltherapist and how early they are affected by this problem.They are potentially exposed to back pain due to occupational risks such as poor working postures and frequent manual handling activities, often undertaken in difficult environments and with variable training regarding personal safety.This study was planned to collect data about prevalence and responses to work related back pain reported by physical therapist employed in Karachi – Pakistan. A survey questionnaire was constructed as the data collection method. The questionnaire was distributed among 90 physical therapists randomly selected from Liaquat national hospital, Agha Khan University, Ziauddin hospital and National medical centre. The questions included occupational history of physical therapist and musculoskeletal symptoms, special areas, tasks, job – related risk factors and response to injuries. The possible injuries occurred mostly in lower back. The highest risk factors in causing the injury was transferring the patients and lifting. Other job risk factors were sustained demanding postures, manual therapy techniques, repetitions and excessive work loads. Most injured physical therapist modified their techniques for continueing work by modifying body mechanics, increased use of physio aids, frequent change of work position. Among all physical therapists, 43% physical therapists had complained mild back pain, 41.9% physical therapists had complained moderate back pain and 6.5% physical therapists had complained severe back pain.The lower back was the most frequently affected body part. Onset of symptoms for the majority was within five to ten years of practices.