To provide an air-conditioner for unifying the setting and the control and efficiently adjusting the air in a chamber.

This air-conditioner comprises a sensing unit having an indoor temperature sensing unit 11, an outside air temperature sensing unit 12, an exhaust air temperature sensing unit 13, a humidity sensing unit 14, a fan drive number of rotation sensing unit 15, and a carbon dioxide sensing unit 16, a setting unit 30 having a temperature setting unit 31 and a humidity setting unit 32, an indoor ventilation fan drive unit 40, an outside air inflow damper drive unit 50, an inside air discharge damper drive unit 60, a heating drive unit 70, a cooling drive unit 80, a humidification drive unit 90, and a control unit 20 in which the sensed signal of the sensing unit 10 and the set value of the setting unit 30 are input, the enthalpy of the inflow air from the outside calculated by the sensed signal is compared with the enthalpy of the discharged inside air, each drive unit is controlled, and the indoor controls are kept at the set value.