An engine test apparatus includes a dynamometer connected to an engine through a shaft, and a control calculation device configured to control operations of the engine and the dynamometer. The shaft has one end connected to an output shaft of the engine, and the other end connected to a rotation shaft of the dynamometer, and includes a Doppler velocimeter configured to emit laser light to the one end of the shaft or the output shaft of the engine to contactlessly measure a rotation speed of the output shaft of the engine, and transmit the measured rotation speed to the control calculation device. The control calculation device uses the rotation speed transmitted from the Doppler velocimeter to control the operation of the dynamometer.