short time subsequently the controller 110 controls both the first and second hot air heaters 36 and 38 to be operated with the maximum heater capacity m n 100 in the constant rate drying period in which main drying is performed such that the moisture contained in the clothing is removed within a short time at this time the humidity change amount the drying rate is uniformly maintained when the moisture contained in the clothing in the drum 30 is almost removed as the result of the drying operation in the constant rate drying period the humidity change amount is suddenly decreased upon determining that the humidity change amount is greater than the predetermined change amount the controller 110 determines that the period at that time is the quasi falling rate drying period and controls the first hot air heater 36 to be stopped when the heater control is performed such that the first hot air heater 36 having the relatively large capacity m is stopped and the second hot air heater 38 having the relative small capacity n is operated in the quasi falling rate drying period power consumption is reduced without great increase of drying time as confirmed by table 1 above hereinafter the operation of the clothing dryer according to the embodiment will be described fig6 is a flow chart illustrating a control method of the clothing dryer according to an embodiment when a user puts clothing to be dried in the drum 30 and selects a drying course according to kinds of the clothing 200 operation information selected by the user is input to the controller 110 through the input unit 100 the controller 110 controls drying to be performed according to the operation information input through the input unit 100 first.