A component mounter comprising: a rotary head rotatable around an R axis that extends in a vertical direction; multiple suction nozzles configured to pick up a component, the suction nozzles being provided on the rotary head in a lowerable manner at predetermined intervals in a circumferential direction of the rotary head; an R-axis driving mechanism configured to revolve the multiple suction nozzles in a circumferential direction of the rotary head by rotating the rotary head around the R-axis; a Q-axis driving mechanism configured to correct a direction of the component that is being held by the suction nozzle by rotating the component by performing Q-axis rotation operation of rotating the suction nozzle around its own center axis; a Z-axis driving mechanism configured to raise and lower the suction nozzle; a head moving mechanism configured to move the rotary head; a central protruding member provided protruding downwards on a central portion of a lower surface of the rotary head; and a control device configured to control operations of the R-axis driving mechanism, the Q-axis driving mechanism, and the Z-axis driving mechanism, characterized in that the control device is provided with a function to perform control of a large component interference prevention mode, in which, after lowering the suction nozzle using the Z-axis driving mechanism to a component pickup height position that is a lower limit height position of lowering operation of the suction nozzle and picking up the component with the suction nozzle, raising the suction nozzle to an interference-prevention Q-axis rotation height position that is a height position at an intermediate point of raising operation of the suction nozzle, then rotating the component held by the suction nozzle by Q-axis driving operation of the Q-axis driving mechanism so as to correct the direction of the component, and subsequently raising the suction nozzle to a component transport height position that is a maximum height position of the raising operation, and then moving the rotary head using the head moving mechanism, wherein the interference-prevention Q-axis rotation height position is set as a height position at which interference does not occur between the picked up component and the central protruding member even when a large component is picked up by the suction nozzle and rotated. a rotary head rotatable around an R axis that extends in a vertical direction; multiple suction nozzles configured to pick up a component, the suction nozzles being provided on the rotary head in a lowerable manner at predetermined intervals in a circumferential direction of the rotary head; an R-axis driving mechanism configured to revolve the multiple suction nozzles in a circumferential direction of the rotary head by rotating the rotary head around the R-axis; a Q-axis driving mechanism configured to correct a direction of the component that is being held by the suction nozzle by rotating the component by performing Q-axis rotation operation of rotating the suction nozzle around its own center axis; a Z-axis driving mechanism configured to raise and lower the suction nozzle; a head moving mechanism configured to move the rotary head; a central protruding member provided protruding downwards on a central portion of a lower surface of the rotary head; and a control device configured to control operations of the R-axis driving mechanism, the Q-axis driving mechanism, and the Z-axis driving mechanism, characterized in that the control device is provided with a function to perform control of a large component interference prevention mode, in which, after lowering the suction nozzle using the Z-axis driving mechanism to a component pickup height position that is a lower limit height position of lowering operation of the suction nozzle and picking up the component with the suction nozzle, raising the suction nozzle to an interference-prevention Q-axis rotation height position that is a height position at an intermediate point of raising operation of the suction nozzle, then rotating the component held by the suction nozzle by Q-axis driving operation of the Q-axis driving mechanism so as to correct the direction of the component, and subsequently raising the suction nozzle to a component transport height position that is a maximum height position of the raising operation, and then moving the rotary head using the head moving mechanism, wherein the interference-prevention Q-axis rotation height position is set as a height position at which interference does not occur between the picked up component and the central protruding member even when a large component is picked up by the suction nozzle and rotated.