(57) [summary] [purpose] is intended to provide a good endoscopic biopsy brush tool of the operability of the biting of the brush portion can be easily and completely removed with respect to the inner surface of the tube. [Configuration] The manipulation wire 4 to be inserted retractably in the tube 2, and comprising a brush portion 6 which is fixed to the distal end of the manipulation wire 4, the brush part 6 from the distal end of the tube 2 In endoscopic biopsy brush device 1 for collecting endoscopically in biological tissue by a protruded or retracted, the tube 2 Of the value of the ratio of the outer diameter of the brush portion 6 to the inside diameter 1.9 And it is obtained by the following or 2.1 or higher.
展开▼
