PROBLEM TO BE SOLVED: To provide an apparatus for removing shellfishes by which long marine products and shellfish-adhered ropes are certainly and easily pulled up without slipping from the sea.SOLUTION: A compulsively rotative rotary conveyor protruding from a boat is installed. Both of slip-protecting protrusions and slip-protecting spaces or either one of them are made on the surface of the rotary conveyor. A downward inclination angle toward the sea side and/or a protrusion length outward the boat of the rotary conveyor are brought to be adjustable. The rotary conveyor is brought to be received on the boat. A shellfish-removing device for removing the shellfishes from the rope adhered with the shellfishes and pulled up by the rotary conveyor, and a pulling device capable of pulling in the rope, are installed on the boat.