<p>A cavitation observation apparatus for a ship is disclosed. According to an embodiment of the present invention, the cavitation observation apparatus for a ship comprises: a camera unit installed in the front inside of a body part made of a pressure-resistant container to take a picture of the rotation of a propulsive propeller; a light unit installed in the body part; a driving part installed in the body part to move the body part to a desired position in the water; and a connection part installed in the body part and selectively connected to a hull to be fixated while the propulsive propeller is rotating.</p>
