An imaging apparatus, comprising: a light source device including a first light source and a second light source (35, 49); an imaging device including an imaging element that detects light from a light irradiation area to which the light source device irradiates light, so as to produce an imaging signal, wherein said second light source (35, 49) has emission wavelengths that are different from an emission wavelength of the first light source, and the second light source (35, 49) includes a plurality of light sources that have the emission wavelengths different from each other; a phosphor (19, 43) that is disposed to be distant from the first light source and the second light source (35, 49) and absorbs light in a predetermined excitation wavelength band to emit fluorescence, wherein the fluorescence produces white light; and a control section that controls the first light source and the second light source (35, 49), and an optical fiber that is provided between the first light source and the second light source and (ii) the phosphor, wherein the phosphor (19, 43) is disposed on an emission light optical path that is shared by the first light source and the second light source (35, 49), the emission wavelength of the first light source is in the predetermined excitation wavelength band, the emission wavelengths of the second light source (35, 49) are outside of the predetermined excitation wavelength band, and the control section is adapted to switch between emission of the first light source and emission of the second light source, every imaging frame of the imaging device, wherein light emitted from the first light source and light emitted from the second light source are introduced into the optical fiber. a light source device including a first light source and a second light source (35, 49); an imaging device including an imaging element that detects light from a light irradiation area to which the light source device irradiates light, so as to produce an imaging signal, wherein said second light source (35, 49) has emission wavelengths that are different from an emission wavelength of the first light source, and the second light source (35, 49) includes a plurality of light sources that have the emission wavelengths different from each other; a phosphor (19, 43) that is disposed to be distant from the first light source and the second light source (35, 49) and absorbs light in a predetermined excitation wavelength band to emit fluorescence, wherein the fluorescence produces white light; and a control section that controls the first light source and the second light source (35, 49), and an optical fiber that is provided between the first light source and the second light source and (ii) the phosphor, wherein the phosphor (19, 43) is disposed on an emission light optical path that is shared by the first light source and the second light source (35, 49), the emission wavelength of the first light source is in the predetermined excitation wavelength band, the emission wavelengths of the second light source (35, 49) are outside of the predetermined excitation wavelength band, and the control section is adapted to switch between emission of the first light source and emission of the second light source, every imaging frame of the imaging device, wherein light emitted from the first light source and light emitted from the second light source are introduced into the optical fiber.