there is provided a light source device including a first light source configured to emit light in a first wavelength band , a light - source light generation section configured to generate light of each of a plurality of colors by time division by using the first light source , a second light source configured to generate light of a second wavelength band different from the first wavelength band , and a light source control section configured to cause each of the light - source light generation section and the second light source to generate light in one period , and to control a drive timing of each of the first and second light sources to adjust a light - emission timing and a light - emission period of light generated by each of the light - source light generation section and the second light source .