Abstract: A portable dryer includes a housing, a motor installed with a fan inside the housing, an electric heating device electrically connected to the motor for generating heat, a switch electrically connected to the motor, and a battery for supplying electric power to the portable dryer. When the switch is turned on, the battery can supply electric power to the motor and the electric heating device, making the electric heating device generate heat and the motor drive the fan and thus blowing out hot air generated by the electric heating device.