An endoscope apparatus , comprising: a light source device configured to continuously emit first light of a first wavelength band, and sequentially emit second light of plural second wavelength bands different from the first wavelength band and different from each other; and an imaging device including: a spectroscopic unit configured to spectrally separate light from a subject, the light arising from illumination light emitted by the light source device, into light of the first wavelength band and light of the second wavelength bands; a first imaging element configured to generate a first image signal by receiving and photoelectrically converting the light of the first wavelength band spectrally separated by the spectroscopic unit; and a second imaging element configured to generate a second image signal by respectively receiving and photoelectrically converting the light of the second wavelength bands spectrally separated by the spectroscopic unit; wherein the light source device continuously emits light of a green wavelength band that is the first wavelength band, and sequentially emits light of a red wavelength band and light of a blue wavelength band, the red wavelength band and blue wavelength band being the second wavelength bands, and the first and second imaging elements generate the first and second image signals in synchronization with emission time periods of the first and second light by the light source device . a light source device configured to continuously emit first light of a first wavelength band, and sequentially emit second light of plural second wavelength bands different from the first wavelength band and different from each other; and an imaging device including: a spectroscopic unit configured to spectrally separate light from a subject, the light arising from illumination light emitted by the light source device, into light of the first wavelength band and light of the second wavelength bands; a first imaging element configured to generate a first image signal by receiving and photoelectrically converting the light of the first wavelength band spectrally separated by the spectroscopic unit; and a second imaging element configured to generate a second image signal by respectively receiving and photoelectrically converting the light of the second wavelength bands spectrally separated by the spectroscopic unit; a spectroscopic unit configured to spectrally separate light from a subject, the light arising from illumination light emitted by the light source device, into light of the first wavelength band and light of the second wavelength bands; a first imaging element configured to generate a first image signal by receiving and photoelectrically converting the light of the first wavelength band spectrally separated by the spectroscopic unit; and a second imaging element configured to generate a second image signal by respectively receiving and photoelectrically converting the light of the second wavelength bands spectrally separated by the spectroscopic unit; the light source device continuously emits light of a green wavelength band that is the first wavelength band, and sequentially emits light of a red wavelength band and light of a blue wavelength band, the red wavelength band and blue wavelength band being the second wavelength bands, and the first and second imaging elements generate the first and second image signals in synchronization with emission time periods of the first and second light by the light source device . <EOS>