A high-frequency device that detects biological information related to heartbeat, respiration, and the like with high accuracy. A high-frequency device (1) includes a biological signal extracting unit (heartbeat signal extracting unit 53, respiration signal extracting unit 63) that extracts a biological signal representing a specific frequency component； and an autocorrelation function processing unit (heartbeat autocorrelation function processing unit 54, respiratory autocorrelation function processing unit 64) that determines periodicity of an autocorrelation function to calculate biological information.
