A first light source intensity peaks emits a first light having a first wavelength, the capsule endoscope 10, the second light having the second wavelength longer than the first wavelength intensity peaks is an the visible light band an illumination unit including a second light source for emitting, and a third light source emitting the third light in the third wavelength longer than the second wavelength wave peak a the visible light body region, the first a second light receiving element to accumulate charges by receiving at least one first light receiving elements that store charges by receiving at least one of said second optical light, and the third light and the second light , I and a pickup unit including an image signal generator for generating an image signal from the charge stored in at least one of the second light receiving element and said first light receiving element.カプセル内視鏡10は、強度ピークが第1波長の第1光を放射する第1光源と、強度ピークが前記可視光帯域内であって前記第1波長よりも長い第2波長の第2光を放射する第2光源と、波長ピークが前記可視光体域内であって前記第2波長よりも長い第3波長の第3光を放射する第3光源と、を含む照明部と、前記第1光と前記第2光との少なくとも一方を受光して電荷を蓄積する第1受光素子と、前記第2光と前記第3光との少なくとも一方を受光して電荷を蓄積する第2受光素子と、前記第1受光素子と前記第2受光素子とのうち少なくとも一方に蓄積された電荷より画像信号を生成する画像信号生成部と、を含む撮像部と、を備えた。
