Abstract: This system for calculating the cost of labor productivity loss comprises: an employment information storage unit which stores data pertaining to employment information for each employee; a medical examination result storage unit which stores data pertaining to a medical examination for each employee; a stress check result storage unit which stores data pertaining to a stress check for each employee; a setting data storage unit which stores setting data; a cost of labor productivity loss calculation unit which calculates the cost of labor productivity loss from item data stored in the employment information storage unit, item data stored in the medical examination result storage unit, and item data stored in the stress check result storage unit; and an output unit which outputs the calculated cost of labor productivity loss.