To cope with the diversification of various control uses by accurately realizing a low curve coefficient by a bimetal.

This multiplayer bimetal 1 is provided with a laminated material having a three-layer composition layer of a high thermal expansion member 2, a low thermal expansion member 4 and an intermediate member 3 interposed between the high thermal expansion member 2 and low thermal expansion member 4 and having an intermediate thermal expansion coefficient. In the multiplayer bimetal 1, the plate thickness ratio of the high thermal expansion member 2, intermediate member 3 and low thermal expansion member 4 is set into a range of 20-2.5:60-95:20-2.5, and a curve coefficient of 10×10-6/°C or less is obtained on the basis of such constitution.