Para-articular osteochondromas originating in Hoffa’s fat pad are extremely rare, often presenting with nonspecific symptoms that can delay diagnosis. This case report highlights the clinical presentation, diagnostic process, and successful treatment of an osteochondroma within Hoffa’s fat pad, contributing valuable insights to the limited literature on this condition. A 61-year-old female presented with a six-month history of progressive anterior and medial knee pain, exacerbated by activities such as walking and stair climbing. Examination revealed tenderness over the patellar tendon and restricted knee flexion. Imaging studies, including X-ray, CT, and MRI, identified a calcified mass within Hoffa’s fat pad. The patient underwent surgical excision of the lesion, with histopathology confirming the diagnosis of a para-articular osteochondroma. Postoperatively, the patient reported significant improvement in knee pain and regained a normal range of motion. This case underscores the importance of considering para-articular osteochondroma in the differential diagnosis of persistent knee pain with a calcified mass on knee radiographs. Surgical excision is effective in symptom relief and functional recovery, with a low risk of recurrence.