PROBLEM TO BE SOLVED: To provide a sphygmomanometry instrument capable of urging a user to perform sphygmomanometry under a proper environmental temperature, and a sphygmomanometry method and a sphygmomanometry program.SOLUTION: A sphygmomanometry instrument 10 measures an environmental temperature. When the environmental temperature is equal to or higher than a predetermined threshold, the sphygmomanometry instrument 10 implements control so that sphygmomanometry is performed when the environmental temperature is lower than the threshold, it implements controls so that sphygmomanometry is not performed and the user is warned that the environmental temperature is not a proper temperature for sphygmomanometry.