Wire rope flaw detection device and wire rope diagnosis method

The invention provides a steel wire rope flaw detection device and a steel wire rope diagnosis method, which can reduce strand noise signals of a steel wire rope regardless of the arrangement of a magnetic sensor in the length direction of the steel wire rope. This wire rope flaw detection device (1) is provided with: a magnetizer (30) that forms a magnetic circuit in a predetermined section of a wire rope; a plurality of magnetic sensors (3) capable of detecting a magnetic signal derived from a leakage magnetic flux generated from the wire of the wire rope; a signal analysis unit (7) configured so as to comprise: a signal collector (17) for collecting the magnetic signal output from the magnetic sensor (3); and a signal processor (18) that performs additive processing on the magnetic signal output from the signal collector (17). The signal analysis unit (7) performs phase adjustment of the plurality of magnetic signals detected by the plurality of magnetic sensors (3), acquires addition data of the plurality