The invention relates to a thermometer holder, particularly to a thermometer holder applicable to children. A purpose of the invention is to provide the thermometer holder that can better hold a thermometer and is applicable to the children. The technical solution is as follows: the thermometer holder applicable to children comprises hanging rods, an elastic rod, a mounting plate, a swinging rod,a tension spring, a stopper, a moving rod, and the like; the left and right ends of the elastic rod are provided with hanging rods; the middle of the lower side of the elastic rod is provided with themounting plate; the middle of the mounting plate is rotatably provided with the swinging rod; a strip-shaped through hole is formed in the middle of the front portion of the swinging rod; a tension spring is connected to the right end of the swing rod; and the right end of the tension spring is provided with the stopper. According to the thermometer holder applicable to the children, the medicalstaff can insert the thermometer into a fixing sleeve, and then put the thermometer under the children armpit by setting the fixing sleeve and an elastic ring, so that the thermometer can be well fixed under the children armpit, and inaccurate measurement results caused by the active movement of children can be avoided.