An apparatus for testing an aircraft brake disc includes: a base member having a shaft mount unit; a main shaft rotatably mounted on the shaft mount unit of the base member; a wheel assembly couple to the main shaft; a first wheel mount assembly that is disposed at a side from the base member to move in the radial direction of the wheel assembly; a first driving unit moving the first wheel mount assembly; a second wheel mount assembly that is disposed at the other side from the base member to move in the radial direction of the wheel assembly; a second driving unit moving the second wheel mount assembly; a motor assembly connected to a side of the main shaft and rotating the wheel assembly; and a first flywheel assembly separably coupled to the other side of the main shaft.