A rotary head type component mounter, comprising: a rotary head configured to hold a specified quantity of suction nozzles in an exchangeable manner at a specified nozzle pitch in a circumferential direction; a nozzle station configured such that multiple suction nozzles are arranged to be exchanged with a suction nozzle held by the rotary head; a head rotating mechanism configured to revolve the specified quantity of suction nozzles in a rotation direction of the rotary head by rotating the rotary head; a head moving mechanism configured to move the rotary head in XY directions to and from a component pickup area at which component pickup operation is performed, a component mounting area at which component mounting operation is performed, and a nozzle exchange area at which exchange operation of suction nozzles is performed; a Z-axis driving mechanism configured to drive raise and lower the suction nozzle in the component pickup area, the component mounting area, and the nozzle exchange area so as to perform component pickup, component mounting, and exchange of the suction nozzle; a control means configured to perform control of the head rotating mechanism, the head moving mechanism, and the Z-axis driving mechanism; and characterised by a station position and angle detecting means configured to detect a position and angle of the nozzle station, wherein the Z-axis driving mechanism is configured to simultaneously lower multiple suction nozzles of the specified quantity of suction nozzles held by the rotary head, and the control means is configured to, when the head moving mechanism moves the rotary head to the nozzle exchange area for exchange of suction nozzles to be performed, correct the position of the rotary head moved by the head moving mechanism based on a position of the nozzle station detected by the station position and angle detecting means, correct the rotation angle of the rotary head rotated by the head rotating mechanism to be aligned with the angle of the nozzle station detected by the station position and angle detecting means, and cause the Z-axis driving mechanism to simultaneously lower multiple of the suction nozzles held by the rotary head and perform simultaneous exchange with multiple of the suction nozzles in the nozzle station. a rotary head configured to hold a specified quantity of suction nozzles in an exchangeable manner at a specified nozzle pitch in a circumferential direction; a nozzle station configured such that multiple suction nozzles are arranged to be exchanged with a suction nozzle held by the rotary head; a head rotating mechanism configured to revolve the specified quantity of suction nozzles in a rotation direction of the rotary head by rotating the rotary head; a head moving mechanism configured to move the rotary head in XY directions to and from a component pickup area at which component pickup operation is performed, a component mounting area at which component mounting operation is performed, and a nozzle exchange area at which exchange operation of suction nozzles is performed; a Z-axis driving mechanism configured to drive raise and lower the suction nozzle in the component pickup area, the component mounting area, and the nozzle exchange area so as to perform component pickup, component mounting, and exchange of the suction nozzle; a control means configured to perform control of the head rotating mechanism, the head moving mechanism, and the Z-axis driving mechanism; and characterised by a station position and angle detecting means configured to detect a position and angle of the nozzle station, wherein the Z-axis driving mechanism is configured to simultaneously lower multiple suction nozzles of the specified quantity of suction nozzles held by the rotary head, and the control means is configured to, when the head moving mechanism moves the rotary head to the nozzle exchange area for exchange of suction nozzles to be performed, correct the position of the rotary head moved by the head moving mechanism based on a position of the nozzle station detected by the station position and angle detecting means, correct the rotation angle of the rotary head rotated by the head rotating mechanism to be aligned with the angle of the nozzle station detected by the station position and angle detecting means, and cause the Z-axis driving mechanism to simultaneously lower multiple of the suction nozzles held by the rotary head and perform simultaneous exchange with multiple of the suction nozzles in the nozzle station.