The invention discloses a
biopsy needle, a
biopsy kit and a
biopsy device, and relates to the technical field of
medical instruments.The biopsy needle comprises a puncture tube and a needle head, the puncture tube comprises an outer tube and a puncture head, the outer tube is provided with an
assembly channel and a sampling window, and the puncture head is arranged at the front end of the outer tube; a
cutting part is arranged at the front end of the inner knife tube, the inner knife tube movably penetrates through the assembling channel, and a gap is formed between the inner knife tube and the inner wall of the assembling channel so as to
cut tissue entering the assembling channel through the sampling window; the tissue collector is provided with a collecting cavity, and the rear end of the inner knife tube extends into the collecting cavity; the fluid component is internally provided with a flow channel, part of the fluid component extends into the collecting cavity, the fluid component is provided with an external connector exposed out of the tissue collector, and the external connector is communicated with the flow channel; by moving the fluid component and / or the inner knife tube, the fluid component is in
butt joint with or separated from the rear end of the inner knife tube, so that the inner channel of the inner knife tube selectively communicates with the flow channel or the collecting cavity. According to the technical scheme provided by the invention, the complexity of intraoperative
liquid injection operation is reduced.