Pin bone removal apparatus for removing pin bones in fillets of fish flesh, the pin bone removal apparatus comprising at least a conveyor for movement of the fillets forward in a flow, including controllable steps or forward continuous movement, where the fillets are in motion at both the controllable steps or the forward continuous movement, and a pin bone removal unit comprising at least two flexible pull mechanisms, the at least two flexible pull mechanisms each comprising a rotating drum arranged on an arm, where the arm has a number of flexibly positioning means (29, 30, 31, 32, 33, 42, 43), which can react to the individual fillets in motion, including a linear horizontal movement means for horizontal positioning of the rotating drums, wherein before the pin bone removal unit, the pin bone removal apparatus further comprises at least one scanner for measuring the individual fillets to adjust the rotating drums to the individual fillets, - wherein the at least one scanner comprises at least a positioning unit and a bone detection unit, - wherein the at least two flexible pull mechanisms are arranged next to and/or in succession of each other, which can react to the individual fillets in motion, - wherein the flexibly positioning means of each arm include a linear vertical movement means for vertical positioning of the rotating drum, which can react to the individual fillets in motion, - wherein the rotating drums have flexible positioning means different from the flexibly positioning means of the arm, and - wherein the flexible positioning means of the rotating drums and the flexibly positioning means of the arm can adjust the position of the rotating drums relative to the individual fillets in motion. a conveyor for movement of the fillets forward in a flow, including controllable steps or forward continuous movement, where the fillets are in motion at both the controllable steps or the forward continuous movement, and a pin bone removal unit comprising at least two flexible pull mechanisms, the at least two flexible pull mechanisms each comprising a rotating drum arranged on an arm, where the arm has a number of flexibly positioning means (29, 30, 31, 32, 33, 42, 43), which can react to the individual fillets in motion, including a linear horizontal movement means for horizontal positioning of the rotating drums, wherein before the pin bone removal unit, the pin bone removal apparatus further comprises at least one scanner for measuring the individual fillets to adjust the rotating drums to the individual fillets, - wherein the at least one scanner comprises at least a positioning unit and a bone detection unit, - wherein the at least two flexible pull mechanisms are arranged next to and/or in succession of each other, which can react to the individual fillets in motion, - wherein the flexibly positioning means of each arm include a linear vertical movement means for vertical positioning of the rotating drum, which can react to the individual fillets in motion, - wherein the rotating drums have flexible positioning means different from the flexibly positioning means of the arm, and - wherein the flexible positioning means of the rotating drums and the flexibly positioning means of the arm can adjust the position of the rotating drums relative to the individual fillets in motion. - wherein the at least one scanner comprises at least a positioning unit and a bone detection unit, - wherein the at least two flexible pull mechanisms are arranged next to and/or in succession of each other, which can react to the individual fillets in motion, - wherein the flexibly positioning means of each arm include a linear vertical movement means for vertical positioning of the rotating drum, which can react to the individual fillets in motion, - wherein the rotating drums have flexible positioning means different from the flexibly positioning means of the arm, and - wherein the flexible positioning means of the rotating drums and the flexibly positioning means of the arm can adjust the position of the rotating drums relative to the individual fillets in motion.