Provided is a seat with a function that evaluates the physical state of a sitter that is capable of raising the motivation to use the function. Proposed is a physical state sharing seat which comprises: a seat body; a sensor (8) which acquires a measured value for identifying the physical state of the sitter seated on the seat body; and a control unit (100) connected to the sensor so as to enable acquisition of the measured value from the sensor and configured so as to enable communication with other devices. The control unit (100) comprises: an evaluation unit (121) for calculating an evaluation value of the physical state on the basis of the measured value; an evaluation value presentation unit (122) for presenting the evaluation value to the terminal used by the sitter; a shared data acquisition unit (161) for acquiring an others-evaluation value, which is the evaluation value of the physical state of another sitter as acquired by the evaluation unit or as acquired from another physical state sharing seat; and a shared data presentation unit (162) for presenting the others-evaluation value to the terminal used by the sitter.
PHYSICAL STATE SHARING SEAT