Gas chromatograph device

A gas chromatograph device capable of performing a temperature-rising analysis in which a sample is introduced from a sample introduction unit to a column to detect sample components separated by the column while raising a temperature of the column in a column oven, the gas chromatograph device comprising:

• a heater configured to heat a heating target in the column oven;
• a cooling mechanism configured to cool an inside of the column oven;
• a temperature sensor configured to detect a temperature of the heating target;
• a temperature control unit configured to cool the inside of the column oven using the cooling mechanism upon completion of the temperature-rising analysis and heat the heating target using the heater upon reaching of a detection temperature of the temperature sensor to a target temperature;
• and
• a determination processing unit configured to determine whether or not a temperature of an entirety of the heating target has stabilized based on power consumption of the heater upon reaching of the detection temperature of the temperature sensor to the target temperature.