An arrangement and method for slicing a fish fillet. The arrangement comprises a slicing space which is isolated from its surroundings and unmanned, receiving means for receiving a cutting platform comprising a fish fillet (10) into the cutting space, said cutting platform being fillet specific so that it is arranged to be replaced with the fish fillet (10) adapted on it, a cutting blade (9), which is non-rotating and adapted in the slicing space, a cutting actuator adapted to bring the cutting blade (9) into a linear cutting movement in relation to the cutting platform to detach a slice from the fish fillet (10), and transfer means arranged to transfer the blade to such a position in relation to the cutting platform where the subsequent slice is cut off from the fish fillet (10).
