| 摘要 |
An endoscope insertion portion of the invention includes a distal end portion at distal end part and is inserted into a body cavity, the endoscope insertion portion including: a plurality of observation windows for leading incident light to each of a plurality of image pickup portions, the plurality of observation windows being disposed to the distal end portion; and an air/water feeding portion for spouting out a gas or liquid toward the plurality of observation windows, the air/water feeding portion being disposed to the distal end portion, wherein on the distal end portion, an outer surface is formed between the plurality of observation windows oriented in a spouting direction of the air/water feeding portion, the outer surface being in the same plane as surfaces of the plurality of observation windows. Thus, observation optical systems of a plurality of image pickup units are located on a generally straight line in the spouting direction of the air/water feeding portion for feeding air or water, and filth or the like adhered on outer surfaces of the observation optical systems are efficiently removed by one air/water feeding nozzle so as to secure respective observation field of views of the observation optical systems. |
