We report the case of a 21-year ice hockey player with an accessory soleus muscle located medially in the ankle region. The swelling made it increasingly difficult for him to fit his skating boots and caused some pain during play. He was successfully treated by excising the muscle. Previously, the diagnosis was verified surgically in most reported cases. Like most recent authors, we believe that the diagnosis can be confirmed by CT-scan and/or MRI-scan. Surgical excision of the muscle should be reserved for symptomatic cases.