To provide a photocatalyst support board capable of exhibiting the photocatalytic function of titanium oxide fine particles by depositing a large quantity of titanium oxide fine particles and provided with sufficient strength as a formed product.

The photocatalyst support board L has photocatalytic functional faces in both front and rear faces formed by packing and compacting a powder mixture A obtained by mixing and stirring photocatalyst particles 90% by weight and PTFE particles 10% by weight and fibrillating the PTFE particles in an expanded metal E having a large number of pores e in a manner that the powder mixture fills the pores e, sintering the resulting expanded metal E by heating at a melting point of the PTFE or higher, and fitting the expanded metal in the inner groove f so as to fix the expanded metal in a reinforcing frame F made of a stainless steel.

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