To provide a glass honeycomb by which light reaches deep layer parts to increase the efficiency of a photocatalyst and a method of manufacturing the same.

The glass honeycomb is formed by arranging a plurality of transparent glass tubes nearly in parallel to the tube axis and fusing. The method of manufacturing the glass honeycomb is carried out by preparing the plurality of the transparent glass tubes, arranging each of the glass tubes nearly parallel to the tube axis to come into contact with each other and heating.