An endoscope apparatus includes: a first semiconductor light-emitting element； a light source drive section； a first detection section； a storage section configured to store a threshold value indicating whether or not the first detection section can correctly detect an intensity； and a control section configured to, if the intensity detected by the first detection section exceeds the threshold value stored in the storage section, control the current value of the drive signal based on the intensity detected by the first detection section, for the light source drive section, and if the intensity detected by the first detection section does not exceed the threshold value, perform control so as to make the current value of the drive signal constant to provide pulsed light emission and change a duty cycle or a number of pulses to perform light adjustment, for the light source drive section.
