This devise is unnecessary use of germicidal lamp, hence power dissipation without a stable relates to a toothbrush sterilizer that effectively can achieve the sterilization of the toothbrush. In the structure of the present invention is built doll toothbrush sterilizer, to form a receiving space on the inner side formed to be coupled to the cabinet of the bathroom, and the body is provided with a magnetic sensor is operated in accordance with the door opening and closing of the cabinet on one side of the receiving space , with toothbrush holder which is detachably coupled to the inner side of the body, is coupled to the inside of the body is illuminated in accordance with the detection signal of the magnetic detector and sterilizing lamp for sterilizing a toothbrush, coupled to the toothbrush holder, inside the accommodation space is in communication with the outside air through the fan and is connected to the magnetic sensor, a germicidal lamp and the fan and electric wire provided in the main body configured to include a control unit to operate the germicidal lamp and fan. Above the present invention is to, first, according to the door opening and closing the cabinet that is coupled to the main body case to sterilize the toothbrush is received in the interior so that it is possible to automatically sterilizing lamp is turned on to achieve a reliable and efficient use of the toothbrush sterilizer built doll can. Second, avoid sterilizing lamp provided in the inside of the main body is made of the lighting of the germicidal lamp unnecessary to configure the control in accordance with the operation of the door opening and closing or control of the cabinet and to prevent unnecessary power consumption of the toothbrush sterilizer for sterilizing lamp according to this and prevents the service life is of course, to prevent unnecessary power consumption of the overall toothbrush sterilizer can be obtained an overall cost savings. Thirdly, keep the inside of the toothbru
