Ba-Al is an alloy powder and Ni powder and getter material composed of a powder mixture comprising, the getter material when heated in a vacuum or in an inert gas, the powder mixture is an exothermic reaction a getter material, wherein the temperature to start is in the range of less 900 ° C. 750 ° C. or higher. According to this getter material, to a temperature at which powder mixture starts the exothermic reaction is defined in the appended temperatures higher than 750 ℃ ​​900 ° C. or less, properly in a stable state without excess or shortage amount of evaporation of the getter components it is possible to control, also getter material and evaporable getter device time has excellent response shortened from the heating start to the getter component begins to evaporate is obtained. Also without being metal container for filling a getter material is or melt deformation, evaporable getter device electron tube can be shortened heating evaporation process time of the getter material is the time for obtaining a predetermined degree of vacuum and has an excellent response short It is obtained.