Heat-insulating die and production method thereof

Provided is a die comprising a heat insulating layer which does not require a post-treatment, enables a higher level of uniformity in thickness, and has a superior adherence property to the die. Disclosed are a heat-insulating die and a production method thereof, wherein the die has a heat-insulating layer between a metal die base and a metal film configuring a molding surface, and the heat-insulating layer is made of a porous body in which ferrite crystal particles are connected in a three-dimensional mesh form.