The rupture of the Achilles tendon is rather uncommon, but its incidence has been increasing. Main causes are usually due to direct injury or sudden indirect high energy trauma such as sports activity without predisposing disease. Spontaneous rupture of the Achilles tendon are sporadically reported especially from person who took steroid or with similiar predisposing disease. We experienced a patient with bilateral ruptures of the Achilles tendon that had occurred almost spontaneously, without any steroid related medication or underlying diseases.