To provide a light source device which is more compact and inexpensive than conventional ones, and an endoscope system having a compact and inexpensive light source device.SOLUTION: In a light source device 14, a light source unit 20 includes a first light source 71 that emits blue light, a second light source 72 that emits broadband green light including not only a green component but also a red component, and an optical filter 73 that adjusts the amount of broadband green light for each wavelength. In the optical filter 73, the transmittance of the broadband green component in the case of transmitting the broadband green light or the reflectance of the broadband green component in the case of reflecting the broadband green light increase toward a long wavelength side in a range of the red component.SELECTED DRAWING: Figure 6【課題】従来よりもコンパクトかつ安価な光源装置、及び、コンパクトかつ安価な光源装置を有する内視鏡システムを提供する。【解決手段】光源装置１４は、光源部２０に、青色光を発光する第１光源７１と、緑色成分の他に赤色成分を含む広帯域な緑色光を発光する第２光源７２と、広帯域な緑色光の光量を波長ごとに調節する光学フィルタ７３と、を備える。光学フィルタ３７は、広帯域な緑色光を透過する場合に広帯域な緑色光の透過率、または、広帯域な緑色光を反射する場合に広帯域な緑色光の反射率が、赤色成分の範囲において長波長側にかけて増加する。【選択図】図６
