To provide a heat stroke risk calculation system in which a heat stroke risk can properly be calculated when the risk decision of the heat stroke is performed, and provide a heat stroke risk calculation program, a computer-readable recording medium and a heat stroke risk calculation method.SOLUTION: A heat stroke risk calculation system includes a living body information acquisition unit 21 for acquiring living body information of a user U measured with a helmet 6, an environmental information acquisition unit 22 for acquiring ambient environmental information, a user's mark calculation unit 301 for calculating a user's mark based on the living body/environmental information, and a determination mark calculation unit 302 for calculating a determination mark by accumulation of a value calculated from the user's mark and the time coefficient being set every elapsed time. The user's mark calculation unit 301 highly calculates the user's mark as the value of the living body/environmental information is far from a preset setting value, and the time coefficient is set to become smaller as an elapsed time dates back to the past.SELECTED DRAWING: Figure 3
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