PROBLEM TO BE SOLVED: To provide an endoscope apparatus which can obtain a polarization characteristic image by predetermined polarization characteristic and display identifiably an expression tissue from a lesion or the like, and to provide an endoscopic diagnosis device.SOLUTION: The endoscope apparatus which has an insertion part inserted in a subject includes: a first optical fiber in which illuminating light is guided to the distal end of the insertion part a first polarizer which allows one polarized light in a polarization state emitted from the illuminating light guided to the distal end of the insertion part by the first optical fiber to pass and first polarization modulation means for sequentially generating three kinds or four kinds of polarized lights in different polarization states which are modulated from polarized lights passing the first polarizer.COPYRIGHT: (C)2012,JPO&INPIT【課題】所定の偏光特性による偏光特性画像を得て、病変部等からの表出組織を識別可能に表示することができる内視鏡装置および内視鏡診断装置を提供する。【解決手段】被検体内に挿入される挿入部を備える内視鏡装置であって、照明光を挿入部の先端部まで導光する第1の光ファイバと、第1の光ファイバにより挿入部の先端部まで導光される照明光から、1つの偏光状態の偏光光を通過させる第1の偏光子と、第1の偏光子を通過する偏光光を変調して偏光状態の異なる3種類ないし4種類の偏光光を順次発生する第1の偏光変調手段とを備える。【選択図】図13
