The purpose of the present invention is to perform pulse wave detection that is robust against changes in brightness. A pulse wave detection device 1 color-converts a frame image of a video from RBG components to YIQ components, and identifies an eye section using the eye color of a user prepared in advance with a Q component. Next, the pulse wave detection device 1 uses the Y values of the eye section to detect the brightness of the imaging environment. Then, the pulse wave detection device 1 detects a pulse wave signal Qm on the basis of the average of the Q values of a skin section in the frame image, corrects a change in the brightness by subtracting from Qm the average value Ye of the Y values of the eye section, and thereby outputs a post-brightness-correction Qm. As a result, a pulse wave can be successfully detected even if the brightness is changing because the user is moving in a vehicle or the like.