耳內(nei)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)（in-the-ear，ITE），也稱為耳甲(jia)腔式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)。耳內(nei)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)是(shi)最早開(kai)發應(ying)用(yong)的(de)(de)定(ding)制式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)。它占據耳甲(jia)腔和耳甲(jia)艇(ting)，從解剖學來講，也叫耳甲(jia)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)。其外(wai)(wai)殼是(shi)根據聽(ting)(ting)(ting)障者的(de)(de)耳甲(jia)腔形狀(zhuang)定(ding)制的(de)(de)，麥克風、放大器(qi)(qi)和耳機全部放在定(ding)制的(de)(de)外(wai)(wai)殼內(nei)，外(wai)(wai)部不需(xu)要任(ren)何導(dao)線和軟管(guan)，能全部放在耳甲(jia)艇(ting)、耳甲(jia)腔和外(wai)(wai)耳道內(nei)，比(bi)較隱蔽輕便。此類助(zhu)聽(ting)(ting)(ting)器(qi)(qi)的(de)(de)麥克風入口(kou)位(wei)于助(zhu)聽(ting)(ting)(ting)器(qi)(qi)外(wai)(wai)側(ce)面，比(bi)起耳背(bei)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)更符合人(ren)耳感(gan)受聲(sheng)音的(de)(de)自然位(wei)置，耳內(nei)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)體(ti)積(ji)和面板面積(ji)相對較大，使雙麥克風技術較易(yi)得到(dao)應(ying)用(yong)。