To provide a head and internal organ remover from fish bodies, particularly of medium and small sizes, that can remove the head and internal organs without cutting its belly part as the cross section of the head cut is kept finely finished continuously, can be easily handled even by an unskilled person.

This automated small or medium-size fish body dressing machine comprises the conveyer 1 that conveys fish bodies as the fish heads are kept in a prescribed direction, the positioning device 2 that automatically decide the cutting position, the nipping device 3 that nips fish bodies, the cutter 4 that cuts the head of the fish, the separator 5 that separates the fish head cut from the body, and the output 6 that sends out the dressed fish bodies.