Objective: Swimming is a complex sport that is characterized by the coordinated movements of body parts. The aim of this study was to examine the relationship between glenohumeral joint position sense and physical performance of upper extremities in swimmers with physical disabilities. Material and Methods: 29 physically disabled swimmers were included in the study and classified as S/SB 6- S/SB 10 according to the paralympic classification system. Classification process has included tree stages: physical evaluation, technical evaluation and obsevational evaluation. Evaluation of the glenohumeral joint position sense of the athletes was evaluated by using the active angle repetition test with the assistance of smart phone inclinometer application, swimming performance of athletes was evaluated with 50 m free style swimming performance. Results: The 29 athletes included in the study, 13.8% (n=4) S6, 6.9% (n=2) S7, 20.7% (n=6) S8, 34.5% (n=10) S9 and 24.1% (n=7) are in S10 class. There wasn’t relationship between athletes' (absolute repositioning error) results of internal and external rotation active joint position sensation of the dominant upper extremity glenohumeral joint and 50 m free swimming performance (p>0.05). Conclusion: As a result, there wasn’t relationship between glenohumeral joint position sense and swimming performance in physically disabled swimmers but it emphasizes the importance of proprioceptive sensory assessment and training in training and rehabilitation programs in order to prevent any possible injury.