PROBLEM TO BE SOLVED: To provide an ophthalmologic apparatus capable of deriving stable performances of a wavelength sweeping light source by controlling a temperature of the wavelength sweeping light source.SOLUTION: A light source temperature control unit for adjusting a temperature of a wavelength sweeping light source 14 comprises: the wavelength sweeping light source 14 a light source temperature sensor 16 for detecting the temperature of the wavelength sweeping light source 14 an ambient temperature sensor 18 for detecting a temperature in the atmosphere and Peltier element for heating or cooling the wavelength sweeping light source 14. The light source temperature control unit includes temperature control means 64 that controls Peltier element on the basis of the detection temperatures of the light source temperature sensor 16 and the ambient temperature sensor 18.
