Inclusion body myositis is the most common idiopathic inflammatory myopathy in elderly individuals. It typically causes proximal and distal limb weakness with forearm flexors and quadriceps being the most severely affected muscles. Axial musculature is infrequently involved. Here, we report an 80-year-old man who presented with an 18-month history of progressive truncal weakness causing stooped posture while standing and walking. Neurologic examination revealed no limb weakness. magnetic resonance imaging studies showed atrophy and findings, suggesting fatty replacement of paraspinal muscles. Needle electromyography confirmed the presence of an axial myopathy. Thoracic paraspinal muscle biopsy showed canonical features of inclusion body myositis. The current patient broadens the clinical presentation of inclusion body myositis.