Lighting device and illumination fixture using the same

[Object] To provide a lighting device that can reduce power loss, and when a load is abnormal, prevent a current from being concentrated on a normal light emitting module, and an illumination fixture using the lighting device. [Means for Settlement] The lighting device is provided with: a lighting part that performs constant current control of an LED current Io supplied to a load 12 that is configured to parallel connect a plurality of LED modules 122 each having a plurality of series connected LED elements 121; a current detecting part 7 that detects a current that flows through any one LED module 122 from among the LED modules 122; and an abnormality detecting part 11 that compares a detection value by the current detecting part 7, and an upper limit value and a lower limit value with each other to thereby detect an abnormality of the load 12, wherein: the abnormality detecting part 11 detects the abnormality of the load 12 if the detection value by the current detecting part 7 is larger than the upper limit value or smaller than the lower limit value; and if the abnormality detecting part 11 detects the abnormality of the load 12, the lighting part reduces the LED current Io supplied to the load 12.