A wrist sphygmomanometer includes an operation unit operable by a user. A manometer measures blood pressure. A detector detects the posture of the user. A storage stores an optimum posture for the user. A comparator compares the posture detected by the detector and the optimum posture stored beforehand in the storage to generate posture information. A communication unit communicates the posture information to the user. A setting unit sets the optimum posture in the storage. The storage includes a first storage section, which stores a fixed optimum posture corresponding to an unspecified user, and a second storage section, which stores a second optimum posture corresponding to a specified used. The setting unit stores the second posture based on a value detected by the detector as the second optimum posture in the second storage section in accordance with an operation of the operation unit.
