A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100 C. to 2300 C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.

A tungsten-containing material that has an oxygen generation quantity of more than 1 ppm and 20 ppm or less at 2100 C. to 2300 C. as detected by oxygen analysis based on an oxygen separation method, and contains 5 ppm or more and 30 ppm or less of potassium.