Biopsy treatment instrument according to the present invention, a flexible sheath, a retractable insertion portion inside the flexible sheath, the specimen collection recess provided on a side surface of the insertion portion of the specimen collection recess a capacitive ultrasonic transducer array disposed on the bottom surface, the recess for sample collection is I and a sliding portion to slide relative to the flexible sheath with the insertion part so as to open and close. Since so as to determine on the basis of a reflected wave that has been received at the capacitive ultrasonic transducer array whether or not the sample has been incorporated into the recess for sample collection, it is possible to reliably collect a specimen.本発明による生検処置具は、可撓性シースと、この可撓性シース内を進退可能な挿入部と、この挿入部の側面に設けられた検体採取用凹部と、この検体採取用凹部の底面に設けられた静電容量型超音波振動子アレイと、検体採取用凹部が開閉するように挿入部と可撓性シースとを相対的にスライドさせるスライド部とを含んでいる。検体採取用凹部に検体が取込まれたか否かを静電容量型超音波振動子アレイで受波した反射波に基づいて判断するようにしたので、検体を確実に採取することができる。
