Over the entire range through distant from foreground to perform good lighting, to perform a clear observation in any of observations over the distant from the foreground. Provided in the insertion portion of the tip of the endoscope apparatus, an observation optical system 3 for observing the observation target, provided in the insertion portion 1, the illumination light emitted from the light source in light distribution in the observation target plurality of illumination optical systems 2a for illuminating the same field of view, comprising: a 2b and is the first illumination optical system 2a having at least one convex lens of the plurality of the illumination optical system, and the other at least one concave lens to provide an endoscope apparatus according to a second illumination optical system 2b having.近景から遠景にかけての全範囲に亘って良好な照明を行い、近景から遠景に亘る何れの観察においても明瞭な観察を行う。内視鏡装置の先端の挿入部に設けられ、観察対象を観察するための観察光学系3と、前記挿入部1に設けられ、光源から出射された照明光を前記観察対象に配光して同一視野を照明する複数の照明光学系2a,2bと、を備え、複数の前記照明光学系のうち少なくとも1つが凸レンズを有する第1の照明光学系2aであり、且つ、他の少なくとも1つが凹レンズを有する第2の照明光学系2bである内視鏡装置を提供する。
