There is provided a pulse wave detector which can accurately detect a pulse wave while realizing superior attachability and preventing positional displacement of a pulse wave detecting section with respect to the radial artery from occurring, and a biometric information measurement device including the detector. A biometric information measurement device 10 includes: a housing 20 which accommodates a pulse wave detecting section 22； a band 40 for securing the housing 20 to the wrist W； a first engaging portion 29 which is disposed on a first end portion 28 of the housing 20 on the side of the ulna S in the circumferential direction of the wrist W, and with which a basal end portion 41 of the band 40 is engaged； a second engaging portion 27 which is disposed on a second end portion 26 of the housing 20 on the side of the radius T in the circumferential direction, and with which an arbitrary position 44 in the longitudinal direction of the band 40 engaged with the first engaging portion 29 is engaged； and a hook and loop fastener 42 for causing a tip end portion 43 of the band 40 to be engaged with the basal end portion 41 in a state where the basal end portion 41 engaged with the first engaging portion 29 and a tip end portion 43 of the band 40 engaged with the second engaging portion 27 overlap with each other. The tip end portion 43 is engaged in a state where the tip end is directed from a side of a detection surface 21 toward a display surface 23.
