An identification device including a wave extraction unit, a time difference unit, and an information identification unit. The wave extraction unit extracts an ejection wave occurring in reply to heartbeat and a reflected wave occurring in reply to passage of blood outflowing from a heart through a bifurcation of blood vessels, from pulse wave information representing a pulse wave of an identification target. The time difference unit generates time-difference information representing a time difference between the extracted ejection wave and the extracted reflected wave. The information identification unit selects certain list information satisfying a predetermined determination criterion of the time-difference information generated by the generation unit, from list information associating an identification information representing a living body to be an identification target with time-difference information representing the time difference for the pulse wave of the living body, and identifies the identification information in the selected certain list information.
