A method for producing a molten glass conveying equipment element having a conduit structure for molten glass containing at least one conduit comprising platinum or a platinum alloy, a first ceramic structure provided around the conduit and a second ceramic structure located around the first ceramic structure, the method comprising: filling a gap between the conduit and the second ceramic structure with a slurry body, the slurry body being prepared by blending: first particles having a median diameter D50 of 0.2 to 10 μm and containing, in terms of mass% to the entire composition of the first particles, 90 wt% or more of zirconium oxide; second particles having a median diameter D50 of 0.2 to 2 mm and containing, in terms of mass% to the entire composition of the second particles, 75 wt% or more of zirconium oxide, in which the proportion of cubic zirconia in the zirconium oxide is 80 wt% or more, and containing at least one of stabilizers selected from the group consisting of yttrium oxide and cerium oxide in a total content of 6 to 25 wt%; and third particles having a median diameter D50 of 1 to 500 μm and containing, in terms of mass% to the entire composition of the third particles, 50 wt% or more of silicon dioxide, so as to satisfy that the mass ratio of the mass of the first particles to the mass of the second particles (mass of the first particles/mass of the second particles) is 0.30 to 0.6, and the mass ratio of the mass of the third particles in terms of silicon dioxide to the total mass of the first particles and the second particles (mass of the third particles in terms of silicon dioxide/(mass of the first particles + mass of the second particles)) is 0.05 to 0.2; and sintering the slurry body at a temperature of 1,300 to 1,550°C, thereby forming the first ceramic structure. filling a gap between the conduit and the second ceramic structure with a slurry body, the slurry body being prepared by blending: first particles having a median diameter D50 of 0.2 to 10 μm and containing, in terms of mass% to the entire composition of the first particles, 90 wt% or more of zirconium oxide; second particles having a median diameter D50 of 0.2 to 2 mm and containing, in terms of mass% to the entire composition of the second particles, 75 wt% or more of zirconium oxide, in which the proportion of cubic zirconia in the zirconium oxide is 80 wt% or more, and containing at least one of stabilizers selected from the group consisting of yttrium oxide and cerium oxide in a total content of 6 to 25 wt%; and third particles having a median diameter D50 of 1 to 500 μm and containing, in terms of mass% to the entire composition of the third particles, 50 wt% or more of silicon dioxide, so as to satisfy that the mass ratio of the mass of the first particles to the mass of the second particles (mass of the first particles/mass of the second particles) is 0.30 to 0.6, and the mass ratio of the mass of the third particles in terms of silicon dioxide to the total mass of the first particles and the second particles (mass of the third particles in terms of silicon dioxide/(mass of the first particles + mass of the second particles)) is 0.05 to 0.2; and sintering the slurry body at a temperature of 1,300 to 1,550°C, thereby forming the first ceramic structure. <EOS>