A medical headgear configured to be worn on a head of an object, comprising: an ultrasound transducer configured to generate a low intensity ultrasound; a headgear by which the ultrasound transducer is supported, and connecting device disposed between the headgear and the ultrasound transducer to connect the headgear to the ultrasound transducer, wherein the headgear comprises a rear portion case comprising an occipital portion support unit configured to support an occipital portion of a head of an object and a crown support unit configured to support a crown of the head of the object; and a front portion case connected to the rear portion case to be slidably movable in one direction and comprising two temporal portion support units configured to support temporal portions of the head of the object, wherein the front portion case comprises a front portion band extending in one direction and having the two temporal portion support units disposed at both ends, respectively; and a slide band extending in one direction between the crown support unit and the front portion band, wherein one end of the slide band is fixed to the front portion band and another end is supported to be slidable in the occipital portion support unit, characterised in that the slide band is configured to be slidable in a first direction toward the crown support unit to provide access to the frontal lobe of the head of the object, and the slide band is configured to be slidable so as to be spaced apart from the crown support unit in a second direction opposite to the first direction to provide access to the temporal portion of the head of the object; wherein the connecting device comprises a plurality of link structures. an ultrasound transducer configured to generate a low intensity ultrasound; a headgear by which the ultrasound transducer is supported, and connecting device disposed between the headgear and the ultrasound transducer to connect the headgear to the ultrasound transducer, wherein the headgear comprises a rear portion case comprising an occipital portion support unit configured to support an occipital portion of a head of an object and a crown support unit configured to support a crown of the head of the object; and a front portion case connected to the rear portion case to be slidably movable in one direction and comprising two temporal portion support units configured to support temporal portions of the head of the object, wherein the front portion case comprises a front portion band extending in one direction and having the two temporal portion support units disposed at both ends, respectively; and a slide band extending in one direction between the crown support unit and the front portion band, wherein one end of the slide band is fixed to the front portion band and another end is supported to be slidable in the occipital portion support unit, characterised in that the slide band is configured to be slidable in a first direction toward the crown support unit to provide access to the frontal lobe of the head of the object, and the slide band is configured to be slidable so as to be spaced apart from the crown support unit in a second direction opposite to the first direction to provide access to the temporal portion of the head of the object; wherein the connecting device comprises a plurality of link structures.