ultrasonic endoscope of the present invention, the ultrasonic wave transmitting and receiving ultrasonic waves from the upper surface of the rectangular shape the vibrator unit (20), wherein by covering the upper and side surfaces of the ultrasonic transducer unit (20) forming a square pole shape, a chamfered portion cut off at least one corner of the four corners of the quadrangular prism shape an acoustic lens having a (23), and a housing for housing the ultrasonic transducer unit (20) and said acoustic lens (23), a rectangular shape with the four prism shape of the acoustic lens (23) is fitted 1 opening (31), and the second opening portion for deriving the said cable (21) from said first opening (31) in to a (32), said chamfered portion and said first opening (31) a housing (30) forming an adhesive outlet is a gap for discharging the adhesive between the corners, the housing (30) an adhesive which satisfies the adhesive outlet is filled in (33), I have.本発明の超音波内視鏡は、矩形形状の上面から超音波を送受信する超音波振動子部(20)と、前記超音波振動子部(20)の前記上面及び側面を覆うことで四角柱形状を形成し、前記四角柱形状の四隅のうち少なくとも1つの角を切り落とした面取り部を有する音響レンズ(23)と、超音波振動子部(20)及び前記音響レンズ(23)を収容する筐体であって、前記四角柱形状の音響レンズ(23)が嵌め込まれる矩形形状の第1開口部(31)、及び前記第1開口部(31)内から前記ケーブル(21)を導出する第2開口部(32)を有し、前記面取り部と前記第1開口部(31)の角との間に接着剤を流出する隙間である接着剤流出口を形成するハウジング(30)と、前記ハウジング(30)内に充填されて前記接着剤流出口を満たす接着剤(33)と、を有する。
