An imaging method of a structure defect that detects a defect such as a crack contained in a structure, the method using an ultrasonic transmitter that radiates ultrasonic waves and an array receiver having a plurality of reception sensor elements, the method comprising: in a first arrangement in which said ultrasonic transmitter and said array receiver are arranged at predetermined positions with respect to said defect, a first reception process of receiving scattered waves from said defect of said ultrasonic waves radiated from said ultrasonic transmitter to said structure by said array receiver so as to obtain a first reception signal; a first imaging process in which said first reception signal is subjected to a band-pass filter that passes a specific frequency component, and a first image of said defect is obtained; in a second arrangement in which at least one of the positions of said ultrasonic transmitter and said array receiver with respect to said defect is different, a second reception process of receiving the scattered waves from said defect of said ultrasonic waves radiated from said ultrasonic transmitter to said structure by said array receiver so as to obtain a second reception signal; a second imaging process in which said second reception signal is subjected to said band-pass filter, and a second image of said defect is obtained; characterised in that the radiated ultrasonic waves are bursts composed of sine waves with a predetermined number of cycles; the specific frequency component is a centre frequency component of the sine waves, or a frequency component of an integral multiple thereof or a frequency component of an integral fraction thereof; the images of the defect are obtained using the phased array imaging method on the respective signals having passed the band-pass filter; and an extraction process extracting a common portion of said first image and said second image is performed. in a first arrangement in which said ultrasonic transmitter and said array receiver are arranged at predetermined positions with respect to said defect, a first reception process of receiving scattered waves from said defect of said ultrasonic waves radiated from said ultrasonic transmitter to said structure by said array receiver so as to obtain a first reception signal; a first imaging process in which said first reception signal is subjected to a band-pass filter that passes a specific frequency component, and a first image of said defect is obtained; in a second arrangement in which at least one of the positions of said ultrasonic transmitter and said array receiver with respect to said defect is different, a second reception process of receiving the scattered waves from said defect of said ultrasonic waves radiated from said ultrasonic transmitter to said structure by said array receiver so as to obtain a second reception signal; a second imaging process in which said second reception signal is subjected to said band-pass filter, and a second image of said defect is obtained; characterised in that the radiated ultrasonic waves are bursts composed of sine waves with a predetermined number of cycles; the specific frequency component is a centre frequency component of the sine waves, or a frequency component of an integral multiple thereof or a frequency component of an integral fraction thereof; the images of the defect are obtained using the phased array imaging method on the respective signals having passed the band-pass filter; and an extraction process extracting a common portion of said first image and said second image is performed.