To provide a heat insulating panel of excellent executability and workability by arranging a heat insulating member on a base plate integrated with an upper layer and a lower layer of which the main components are mineral fiber and inorganic powder body and a middle layer of which the main component is an inorganic foaming body.
A middle layer part 6 in which the main component is an inorganic foaming body and binder is added thereto, is arranged between an upper layer part 7 and a lower layer part 8 in which the main component is mineral fiber and an inorganic powder body and binder is added thereto, and they are integrated in layers to provide a base plate 5. Surface material 3 is arranged on the whole surface of a heat insulating layer 2, back material 4 is arranged on the whole back face, and hence a heat insulating member 1 is provided. The heat insulating member 1 is arranged on the fixed range of at least one face of the base plate 5, and hence a heat insulating panel A is constituted. Hereby the heat insulating panel A which while forming the heat insulating layer on a building, contributes to improvement of bearing force, earthquake resistance, high durability, fireproofing, and fire resistance, is easy in manufacture, and excellent in executability and workabikity, can be provided.