To detect and display the change of temperature and humidity by a single molding of a single material.

This invention relates to a simple device for detecting and displaying the temperature and humidity by a few components in a state of effectively amplifying the same by utilizing the characteristic that the change of dimension corresponding to the change of temperature and the change of humidity in a coiled or spiral part formed by the resin molding is largely different between the circumferential direction and the orthogonal direction. The coiled or spiral moldings is prepared by using the resin having the difference in linear expansion coefficients (water absorption dimensional change) in accordance with the melting and flowing directions, to detect and display the change of temperature and humidity as the angular change of the molding.