The endoscope apparatus includes a laser diode (11-1, 11-2, 11-3), an illumination system (10), an imaging unit (19), and a light source control unit (16). The light source controller (16) sequentially supplies a plurality of different drive currents to the laser diode within the exposure time of the imaging unit to sequentially emit the plurality of laser beams from the laser diode, and the emission The plurality of drive currents are controlled so that the combined wavelength spectrum width of the combined laser beam in which the plurality of laser beams thus overlapped within the exposure time is wider than the individual wavelength spectrum width of the plurality of laser beams.内視鏡装置は、レーザダイオード(11-1,11-2,11-3)と、照明系(10)と、撮像部(19)と、光源制御部(16)とを含む。前記光源制御部(16)は、前記撮像部の露光時間内に、それぞれ異なる複数の駆動電流を前記レーザダイオードに順次供給して当該レーザダイオードから複数の前記レーザ光を順次射出させ、かつ当該射出された複数のレーザ光が前記露光時間内において重畳された合成レーザ光の合成波長スペクトル幅が前記複数のレーザ光の個々の波長スペクトル幅よりも広くなるように前記複数の駆動電流を制御する。