An ultrasound diagnostic apparatus includes an apparatus for heating a coupling medium, wherein the apparatus includes an external heat conductive unit, including a base for positioning a container storing the coupling medium, and an internal heat sink unit for absorbing heat from the heat generating unit of the ultrasound diagnostic apparatus. The external heat conductive unit and the internal heat sink unit are configured as separate assembly structures such that, in the state of assembly, the heat of the heat generating unit is transferred to the container through them.
