The light source drive unit (42) for applying the first and second drive currents to the B-LDs (45a, 45b) that generate laser light of the same color and the current values of the first and second drive currents are A control unit that controls the light source drive unit (42) so that the current dimming is performed with the maximum pulse width when it is larger than the speckle suppression current value, and the pulse width dimming is performed when it is equal to the speckle suppression current value. (41) The light source device (40) for endoscopes which has these.第１，第２の駆動電流を、同一色のレーザ光を発生するＢ－ＬＤ（４５ａ，４５ｂ）へ各印加する光源駆動部（４２）と、第１，第２の駆動電流の電流値が、スペックル抑圧電流値よりも大きい場合は最大パルス幅で電流調光を行い、スペックル抑圧電流値に等しい場合はパルス幅調光を行うように、光源駆動部（４２）を制御する制御部（４１）と、を有する内視鏡用光源装置（４０）。
