A mounter comprising a lead wire cutting unit for cutting multiple lead wires of a lead component, which is a component having the lead wires, through a relative movement of multiple cutting blades (46,50), wherein the multiple cutting blades (46,50) comprise one or more stationary blades and one or more movable blades, wherein one or more cutting blade holding members (48,52) constitute a stationary blade holding member for holding the one or more stationary blades, the stationary blade holding member being detachably attached to the lead wire cutting unit, at a peripheral portion thereof, wherein the stationary blade holding member comprises one or more through holes at least a part of an edge of which is functioning as the stationary blade, and wherein the mounter further comprises an imaging device and is configured to mount the lead component in which the multiple lead wires are cut by the lead wire cutting unit on a circuit board, characterized in that the lead wire cutting unit is provided with at least one fiducial mark which is provided on the stationary blade holding member, in which the at least one fiducial mark resides at a predetermined relative position with each of the one or more stationary blades, the relative position is a relative position between each of the at least one fiducial mark and each of reference points or reference lines of the one or more through holes, and the mounter further comprises a main memory section storing relative position information, indicating the relative position relationship between each of the at least one fiducial mark and the one or more stationary blades, and a cutting blade position acquisition section configured to acquire a position of each of the at least one fiducial mark based on a captured image of the at least one fiducial mark captured by the imaging device, and thereby acquire a position of each of the one or more stationary blades with respect to the at least one fiducial mark based on the position of each of the at least one fiducial mark so acquired and the relative position information stored in the main memory section. wherein the multiple cutting blades (46,50) comprise one or more stationary blades and one or more movable blades, wherein one or more cutting blade holding members (48,52) constitute a stationary blade holding member for holding the one or more stationary blades, the stationary blade holding member being detachably attached to the lead wire cutting unit, at a peripheral portion thereof, wherein the stationary blade holding member comprises one or more through holes at least a part of an edge of which is functioning as the stationary blade, and wherein the mounter further comprises an imaging device and is configured to mount the lead component in which the multiple lead wires are cut by the lead wire cutting unit on a circuit board, characterized in that the lead wire cutting unit is provided with at least one fiducial mark which is provided on the stationary blade holding member, in which the at least one fiducial mark resides at a predetermined relative position with each of the one or more stationary blades, the relative position is a relative position between each of the at least one fiducial mark and each of reference points or reference lines of the one or more through holes, and the mounter further comprises a main memory section storing relative position information, indicating the relative position relationship between each of the at least one fiducial mark and the one or more stationary blades, and a cutting blade position acquisition section configured to acquire a position of each of the at least one fiducial mark based on a captured image of the at least one fiducial mark captured by the imaging device, and thereby acquire a position of each of the one or more stationary blades with respect to the at least one fiducial mark based on the position of each of the at least one fiducial mark so acquired and the relative position information stored in the main memory section.