PROBLEM TO BE SOLVED: To provide a slit lamp microscope that can favorably obtain a captured image of an eye.SOLUTION: A slit lamp microscope comprises: an illumination optical system having an illumination light source for illuminating an eye an observation optical system for observing a subject eye illuminated by the illumination light source an imaging optical system having an imaging element for imaging the eye illuminated by the illumination light source a filter arranged insertably and removably in an optical path of the illumination optical system or the imaging optical system a filter detection part for detecting a filter placed in the optical path and gain adjustment means for adjusting, according to a filter detection signal provided by the filer detection part, a gain of a signal outputted from each pixel of the imaging element.COPYRIGHT: (C)2014,JPO&INPIT【課題】 眼の撮影画像を好適に得ることができる細隙鏡顕微鏡を提供する。【解決手段】 細隙鏡顕微鏡は、眼を照明する照明光源を持つ照明光学系と、照明光源で照明された被検者眼を観察する観察光学系と、照明光源で照明された眼を撮影する撮像素子を持つ撮影光学系と、照明光学系又は撮影光学系の光路中に挿脱可能に設けられるフィルタと、光路中に置かれたフィルタを検知するフィルタ検知部と、フィルタ検知部によるフィルタの検知信号に応じて、撮像素子の各画素から出力される信号のゲインを調整するゲイン調整手段と、を備える。【選択図】 図2