Disclosed are a thermochromatic earplug and a method for manufacturing the same, in which the color of the thermochromatic earplug is changeable according to the body temperature of a wearer, so that the health state of the wearer is able to be determined through the color of the thermochromatic earplug. The method for manufacturing the thermochromatic earplug includes (a) mixing an earplug raw material including urethane resin with a thermochromatic material, (b) molding and curing a mixture, which is obtained by mixing the earplug raw material with the thermochromatic material, into an earplug shape by pouring the mixture into a mold having a cavity with a shape corresponding to the earplug shape, and (c) demolding a resultant structure, which is obtained by molding and curing the mixture into the earplug shape, from the mold.
