To provide a bushing block obtained by using a material substituted for electrocast brick or the like, having small wear due to molten glass and capable of being stably supplied and also solving a problem of reduction in the temperature of the passing molten glass.

The bushing block is obtained by forming the sintered brick to a prescribed shape and thermally spraying platinum on the inner surface by flame spraying method. The thickness of the platinum coating film is controlled to 250 m (a). In addition, the platinum coating film is partially formed on the front surface and the rear surface alternately which are used as electrodes for electric heating (b).