Biopsy needle apparatus

The present invention relates to dramatically reduce the probability of failure in the collection of biological tissue. A biopsy needle device 1 after firing of the inner needle 2 in accordance with the unlocking operation of Uchiharigakaritome means 8, a piston retraction spring 15 in accordance with the unlocking operation of the piston engaging means 16 piston by retracting the 14, the living tissue is aspirated into the recess 2a and the negative pressure is generated in the concave portion 2a of the inner needle 2, then the outer needle 3 in accordance with the unlocking operation of the outer needle locking means 9 the by firing configured to cut out and obtained intruded biological tissue in the recessed portion 2a. .FIELD 6