A metal mold for forming glass articles having a porous lining layer having an excellent heat-insulating property and the abrasion resistance at high temperature, porous lining layer being so designed that a suitable amount of water can be contained therein. As the lining material, there are used materials having an excellent heat-insulating property, such as hollow glass powder and diatomaceous earth, and materials having excellent abrasion resistance, such as metal powder and ceramic powder. Mainly a heat-resistant polymeric adhesive is used for lining such material on a metal mold.