耳內式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)（in-the-ear，ITE），也稱(cheng)為耳甲(jia)(jia)腔式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。耳內式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)是(shi)最早開發(fa)應(ying)用(yong)的定(ding)制式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。它(ta)占據耳甲(jia)(jia)腔和(he)耳甲(jia)(jia)艇，從解剖學來講，也叫(jiao)耳甲(jia)(jia)式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)。其外(wai)殼(ke)是(shi)根據聽(ting)(ting)(ting)障者的耳甲(jia)(jia)腔形狀定(ding)制的，麥(mai)克風(feng)(feng)、放(fang)(fang)大器(qi)(qi)(qi)(qi)和(he)耳機(ji)全部放(fang)(fang)在定(ding)制的外(wai)殼(ke)內，外(wai)部不需要(yao)任何導(dao)線和(he)軟(ruan)管，能全部放(fang)(fang)在耳甲(jia)(jia)艇、耳甲(jia)(jia)腔和(he)外(wai)耳道內，比較隱蔽輕便。此類助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)的麥(mai)克風(feng)(feng)入(ru)口位于助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)外(wai)側面，比起耳背式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)更符(fu)合人耳感受聲音的自然位置，耳內式(shi)助(zhu)聽(ting)(ting)(ting)器(qi)(qi)(qi)(qi)體積(ji)(ji)和(he)面板面積(ji)(ji)相對較大，使雙麥(mai)克風(feng)(feng)技(ji)術較易得到(dao)應(ying)用(yong)。