An eddy current flaw detection apparatus comprising: a probe comprising a plurality of coils; an AC power source configured to generate an excitation magnetic field in an excitation coil accommodated in the probe to excite an eddy current in an inspection object; a detecting section configured to detect a detection signal generated by an induction magnetic field induced by the eddy current in a detection coil accommodated in the probe; an output section configured to output flaw detection data based on the detection signals; a storage section configured to mutually associate and store the detection signals detected at a same timing from the detection coil; and an evaluating section configured to evaluate an attitude of the probe based on the plurality of detection signals detected at the same timing and associated with each other wherein: the plurality of coils are accommodated in the probe and are configured such that flaw detection can be performed by a self-induction method in which each one of the coils is operated as an excitation coil and a detection coil, and also, flaw detection can be performed by a mutual induction method in which an arbitrary one of the coils is operated as the excitation coil, and at least any one of other coils is operated as the detection coil; and the evaluating section evaluates an attitude of the probe by using amplitudes of the detection signals detected when the coils are operating by the self-induction method, and by using positive or negative of a phase angle of each of the detection signals detected when the coils are operating by the mutual induction method. a probe comprising a plurality of coils; an AC power source configured to generate an excitation magnetic field in an excitation coil accommodated in the probe to excite an eddy current in an inspection object; a detecting section configured to detect a detection signal generated by an induction magnetic field induced by the eddy current in a detection coil accommodated in the probe; an output section configured to output flaw detection data based on the detection signals; a storage section configured to mutually associate and store the detection signals detected at a same timing from the detection coil; and an evaluating section configured to evaluate an attitude of the probe based on the plurality of detection signals detected at the same timing and associated with each other wherein: the plurality of coils are accommodated in the probe and are configured such that flaw detection can be performed by a self-induction method in which each one of the coils is operated as an excitation coil and a detection coil, and also, flaw detection can be performed by a mutual induction method in which an arbitrary one of the coils is operated as the excitation coil, and at least any one of other coils is operated as the detection coil; and the evaluating section evaluates an attitude of the probe by using amplitudes of the detection signals detected when the coils are operating by the self-induction method, and by using positive or negative of a phase angle of each of the detection signals detected when the coils are operating by the mutual induction method. the plurality of coils are accommodated in the probe and are configured such that flaw detection can be performed by a self-induction method in which each one of the coils is operated as an excitation coil and a detection coil, and also, flaw detection can be performed by a mutual induction method in which an arbitrary one of the coils is operated as the excitation coil, and at least any one of other coils is operated as the detection coil; and the evaluating section evaluates an attitude of the probe by using amplitudes of the detection signals detected when the coils are operating by the self-induction method, and by using positive or negative of a phase angle of each of the detection signals detected when the coils are operating by the mutual induction method.