An endoscope apparatus has a temperature sensor unit that is provided at a distal end portion of an insertion portion of an endoscope which can be inserted into a body cavity of a subject, and that is configured to detect a temperature of the distal end portion and output the temperature as a temperature signal, a heating unit that can generate heat for preventing fogging of an objective optical system provided at the distal end portion, and a control unit that performs control so as to cause the heating unit to generate the heat when identification conditions are satisfied, the identification conditions being conditions for identifying whether or not the temperature of the distal end portion detected based on the temperature signal is actually equal to or lower than a predetermined temperature.
