[Problem to be Solved] To provide a vascular baroreflex-related sympathetic activity detection device, a vascular baroreflex-related sympathetic activity detection program, and a vascular baroreflex-related sympathetic activity detection method capable of detecting vascular baroreflex-related sympathetic activity, which is sympathetic nervous activity of a blood vessel involved in a baroreflex function, in a simple and non-invasive manner.[Solution] A vascular baroreflex-related sympathetic activity detection device 1 that detects vascular baroreflex-related sympathetic activity, which is sympathetic nervous activity of the blood vessel involved in the baroreflex function, based on pulse wave data on a biological artery and a beat interval corresponding to the pulse wave data, the vascular baroreflex-related sympathetic activity detection device including a VBRSA-series detecting unit 44 that detects, as a vascular baroreflex-related sympathetic activity series indicative of vascular baroreflex-related sympathetic activity, a series where, from among the series in which the beat interval increases or decreases by n (n is a natural number 3 or more) beats consecutively, a correlation coefficient for the beat interval and pulse wave data is greater than any positive threshold up to the (n−；1)-th beat and the correlation coefficient at the n-th beat falls to or below the threshold.
