耳(er)內(nei)式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)（in-the-ear，ITE），也稱(cheng)為(wei)耳(er)甲腔(qiang)(qiang)式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)。耳(er)內(nei)式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)是(shi)最早(zao)開發應(ying)用(yong)的定制式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)。它(ta)占據耳(er)甲腔(qiang)(qiang)和(he)耳(er)甲艇，從解剖學來講(jiang)，也叫耳(er)甲式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)。其(qi)外(wai)(wai)殼(ke)是(shi)根據聽(ting)障者的耳(er)甲腔(qiang)(qiang)形狀定制的，麥(mai)克(ke)風、放大器(qi)(qi)(qi)和(he)耳(er)機全(quan)部(bu)放在定制的外(wai)(wai)殼(ke)內(nei)，外(wai)(wai)部(bu)不(bu)需要任何導線和(he)軟管，能全(quan)部(bu)放在耳(er)甲艇、耳(er)甲腔(qiang)(qiang)和(he)外(wai)(wai)耳(er)道內(nei)，比(bi)較(jiao)隱蔽輕(qing)便。此類助(zhu)聽(ting)器(qi)(qi)(qi)的麥(mai)克(ke)風入口位(wei)于助(zhu)聽(ting)器(qi)(qi)(qi)外(wai)(wai)側(ce)面(mian)(mian)，比(bi)起耳(er)背式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)更(geng)符合人耳(er)感(gan)受聲音的自(zi)然位(wei)置，耳(er)內(nei)式(shi)(shi)(shi)助(zhu)聽(ting)器(qi)(qi)(qi)體積和(he)面(mian)(mian)板面(mian)(mian)積相(xiang)對(dui)較(jiao)大，使雙麥(mai)克(ke)風技術較(jiao)易得(de)到應(ying)用(yong)。