Improving the light distribution characteristic of illumination light, while guaranteeing satisfactory observation range of vision, miniaturizing the point of the insertion section, insertion characteristic the endoscope which can improve is offered. The point (11) the insertion section of the tube condition which it possesses (13) with, the insertion section (13) to be accommodated inside and the light/write guide who illumination light derived light is done (15) with, the insertion section (13) the point (11) be arranged the point (11) toward facing, the observation territory which illuminates the light/write guide (15) with the flat concave lens which irradiates the illumination light which derived light is done (17) and the flat concave lens (17) by the object glass which condenses (19) with to have light from (A), the light/write guide (15) the flat concave lensThe flat concave lens where (17) the end which opposes, the object glass (19) the optical axis (L) with extends in abbreviation and, balance in order the point (11) the cartridge shoulder (21) and the cartridge shoulder (21) is located (17) the outside, to become tapering facing toward the point, the endoscope which is inclined (1) is adopted.
