To make an electron tube inside atmosphere into a reductive atmosphere easily with good reproductivity, improve quality and reliability, by including Ba-Al alloy powder, Ni powder together with alloy type hydrogen emitting body into a getter material.

A getter device 1 is constituted by packing a getter material 3 into a getter vessel 2, one end of which is opened and having an annular inner wall. For instance, mixed powder; of a Ba-Al alloy powder of 40-60 wt.%, and an Ni powder of 60-40 wt.%; is used as the main component of the getter material 3. Additional quantity for alloy type hydrogen emitting body is nearly a 10-30 wt.% degree preferably to mixed powder of Ba-Al alloy powder and the Ni powder. As the alloy type hydrogen emitting body, the following hydrogen storage alloys are used; a Zr-Ni system, a Zr-Al system, and a Ti, Ta, Th-Ni, Al, system. Quality and reliability can be improved, and a stable in-tube atmosphere can be obtained, by using such the getter device 1.