耳(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)（in-the-ear，ITE），也稱為耳(er)甲(jia)腔式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)。耳(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)是最早開(kai)發應用的(de)(de)定(ding)制式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)。它占據耳(er)甲(jia)腔和耳(er)甲(jia)艇，從解剖學來講，也叫耳(er)甲(jia)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)。其外(wai)殼(ke)是根據聽(ting)(ting)(ting)(ting)(ting)障者的(de)(de)耳(er)甲(jia)腔形狀定(ding)制的(de)(de)，麥(mai)克(ke)風、放(fang)大(da)(da)器(qi)和耳(er)機全(quan)部放(fang)在(zai)定(ding)制的(de)(de)外(wai)殼(ke)內(nei)，外(wai)部不(bu)需要任何導線和軟管，能全(quan)部放(fang)在(zai)耳(er)甲(jia)艇、耳(er)甲(jia)腔和外(wai)耳(er)道內(nei)，比較隱蔽輕便。此類助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)的(de)(de)麥(mai)克(ke)風入口位于助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)外(wai)側面(mian)，比起耳(er)背式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)更符合人耳(er)感受聲音的(de)(de)自然位置，耳(er)內(nei)式(shi)(shi)助(zhu)(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)(ting)器(qi)體積(ji)(ji)和面(mian)板面(mian)積(ji)(ji)相對較大(da)(da)，使雙麥(mai)克(ke)風技術較易得到應用。