Provided is a heat conversion device including a thermoelectric element. In the structure of a heat exchanger to which the thermoelectric module is applied, a pair of heat absorbing modules and a heat emitting module are disposed in a horizontal direction so that a desired air volume and wind speed can be maintained without resistance to an air flow path, a heat conversion effect for air can be implemented, a drying and dehumidifying effect can be implemented, and a heat conversion function having high efficiency can be implemented even under low power consumption.