The present invention provides a body temperature measurement device comprising: a main body which includes a first body comprising first and second regions and a second body mounted on the first body and which is extended in a first direction； a rubber cap encompassing the first region, and formed so as to be insertable into the ear； a temperature sensor disposed in the second region and detecting, with respect to the first direction, a temperature having a specific sensing range； and first and second circuit boards electrically connected to the temperature sensor, disposed in the second region, and disposed in a second direction crossing the first direction.
