To obtain a nonwoven fabric heat-insulating material which uses fiber raw materials and can realize a high heat-insulating effect without enhancing the cost.

This nonwoven fabric heat-insulating material produced by laminating plural card webs, is characterized by containing matrix fibers and thermally fusible fibers in each card web, containing a thin film formed by fusing the thermally fusible fibers on the surface of each card web, fusing the thermally fusible fibers in each card web, and integrally fusing the thermally fusible fibers among the plural card webs.