To provide a fireproof double glazing capable of maintaining the moisture-proof property and the bonding property at the time of ordinary use and exhibiting a fireproof performance in a fire by an easy means.

A plurality of glass plates 2, 3 including at least one heat- resistant fireproof glass are arranged apart in parallel, and a spacer 4 is provided over the whole periphery of peripheral fringe parts of opposing faces and is sealed by a seal layer A arranged on a face for external space of the spacer 4 and an end face of a double glazing 1 over both glass plate end parts and a seal layer B arranged between the spacer 4 and the glass plates to form a hermetically closed space layer. A tape constituted by adding a flame- retardant adhesive to both faces of a flame-retardant base material is adopted as the seal layer B.