耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)（in-the-ear，ITE），也稱為(wei)耳(er)(er)甲腔(qiang)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)。耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)是最(zui)早開發應用(yong)的(de)定(ding)制式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)。它占(zhan)據耳(er)(er)甲腔(qiang)和耳(er)(er)甲艇，從解剖學來(lai)講，也叫耳(er)(er)甲式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)。其外(wai)殼(ke)是根(gen)據聽(ting)(ting)(ting)(ting)障(zhang)者的(de)耳(er)(er)甲腔(qiang)形(xing)狀定(ding)制的(de)，麥克(ke)風、放(fang)(fang)大器(qi)(qi)(qi)和耳(er)(er)機全部放(fang)(fang)在定(ding)制的(de)外(wai)殼(ke)內(nei)，外(wai)部不需(xu)要任何(he)導線和軟管，能全部放(fang)(fang)在耳(er)(er)甲艇、耳(er)(er)甲腔(qiang)和外(wai)耳(er)(er)道內(nei)，比較隱蔽輕便。此類助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)的(de)麥克(ke)風入口位于助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)外(wai)側面(mian)，比起耳(er)(er)背式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)更符(fu)合人耳(er)(er)感受聲音(yin)的(de)自然位置，耳(er)(er)內(nei)式(shi)助(zhu)(zhu)(zhu)聽(ting)(ting)(ting)(ting)器(qi)(qi)(qi)體積(ji)(ji)和面(mian)板面(mian)積(ji)(ji)相對較大，使雙麥克(ke)風技術較易(yi)得到應用(yong)。