本文报道5例头外伤所致传导性耳聋。认为槌骨附着在鼓膜上,并借韧带固定于上鼓室,镫骨借环韧带固定于前庭窗,因此头部外伤砧骨最易受累。诊断应包括:①头部有直接或间接外伤史。②检查无鼓膜穿孔者早期鼓膜常呈红色或伴血鼓室,晚期则为瘢痕或蓝鼓膜。③纯音测听示传导性聋,听力损失为30～60分 This article reports 5 cases of head trauma caused by conductive deafness. It is believed that the mallet adheres to the tympanic membrane and is anchored to the upper tympanum by a ligament, which is fixed by the ligament of the vestibule to the vestibular window so that the head is most vulnerable to trauma. Diagnosis should include: ① the head has a direct or indirect history of trauma. ② check without tympanic membrane perforation of the early tympanic membrane often with red or with tympanic cavity, late scars or blue tympanic membrane. ③ pure tone audiometry showed conductive deafness, hearing loss of 30 to 60 minutes