Abstract: An image pickup unit provided with an image pickup element is of structure capable of being detachably received in an endoscope body or a TV camera. After having been used in observation, the image pickup unit is dismounted, whereby disinfection processing and sterilization processing of the endoscope body from which the image pickup unit is dismounted, or the TV camera can be executed without inviting deterioration and the like of a characteristic of the image pickup unit by a disinfection unit, a sterilization unit or the like.

Abstract: A surgical resecting tool (1) whereby a cartilage, cartilage knob or tumor within a body cavity, for example, such articulation cavity as of a knee is resected from outside the body cavity without being incised and is taken out of the body cavity is provided with a rigid outer tube (4) removably provided in the front part of a body part (2) which is also a holding part and has a rotary power source 28. The outer tube (4) is provided with an opening (7) near the front end part and with a curved part 9 in the rear of the opening (7). The outer tube 4 is provided with a cutting part (13) in the front end part and is removably connected in the rear end part to the rotary power source (28) to resect a living body tissue by rotating and driving the cutting part (13). An inner tube (6) having a flexible part (12) at least in the position corresponding to the above mentioned curved part (9 ) is inserted through the outer tube (4).

Abstract: An electronic endoscope system has an elongated rigid inserting section and a relay optical system disposed therein. The relay optical system transfers an optical image. A imaging device is disposed at a focus position of the relay optical sysetm in a face-to-face relationship with the imaging surface thereof.

Abstract: Endoscopic treating tool in which structure is provided for completely releasing the transmission of force to a treatment part of the tool adjacent a tip end of an insertable part of the tool from the operating member provided at a base side of the insertable part when the operating force for the operating member becomes larger than a predetermined amount.

Abstract: This rigid electronic endoscope is formed of an endoscope body and an elongate tubular guide tube. An insertable part to be inserted through the guide tube is provided in front of this endoscope body. A solid state imaging device as an imaging means is provided in the tip part of this insertable part and a supporting part of a cross-sectional area smaller than of this tip part is provided in the rear of this tip part. A space as a treating tool inserting path or as a liquid feeding and sucking tube path which can feed and drain an irrigating liquid is formed between this supporting part and the inner surface of the guide tube.