In order to provide a highly reliable heart rate, this heartbeat detection device includes: a first detection unit that detects heartbeats from a vibration wave of a body surface of a user detected by a sensor； a second detection unit that extracts a vibration wave of heartbeats which are amplitude-modulated with a resonant frequency of a human body from the vibration wave of the body surface of the user, delays the extracted vibration wave by a predetermined period, and detects heartbeats from differences between the vibration wave before delay and the vibration waves after delay； and an output control unit that selects either the heartbeats detected by the first detection unit or the heartbeats detected by the second detection unit and determines and outputs a heart rate on the basis of the selected heartbeats.
