PROBLEM TO BE SOLVED: To improve pulse wave detection accuracy.SOLUTION: A pulse wave detection device 10 acquires an image captured by a camera 11a, scans an area of interest used for detection of a pulse wave in the image for each of a plurality of acquired images, creates a plurality of first pulse wave waveforms from a pixel value of the area of interest included in a combination of each combination in which the areas of interest scanned for each image are combined among a plurality of images, calculates the similarity between the plurality of created first pulse wave waveforms and a second pulse wave waveform set as a reference, and selects the first pulse wave waveform whose similarity to the second pulse wave waveform is the highest.