NOVELTY - Titanium powder, organic binder, a foaming agent, water, and a surfactant are mixed (S1) to obtain slurry. The obtained slurry is coated (S2) on a support (I), and a molded product is obtained. A foaming molded product is produced by foaming (S3) the molded product. The foaming molded product is separated from the support (I), mounted on a support (II), and degreased (S4). A primary sintered compact is obtained by heating the degreased foaming molded product. The primary sintered compact is sintered (S7), and a porous titanium sintered compact is obtained.    USE - Manufacture of porous titanium sintered compact used for retention material of photocatalyst, power-supply electrode of ozonizer, artificial aggregate, and electrode of fuel cell.    ADVANTAGE - The high quality porous titanium sintered compact is manufactured by economical and efficient method.    DETAILED DESCRIPTION - Titanium powder and/or titanium-hydride powder, organic binder, a foaming agent, a plasticizer, water, and a surfactant are mixed to obtain slurry. The obtained slurry is coated on a support (I), and a molded product is obtained. A foaming molded product is produced by heat-drying and foaming the molded product. The foaming molded product is separated from the support (I), heated, mounted on a support (II), and degreased. A primary sintered compact having electroconductivity is obtained by heating the degreased foaming molded product in non-oxidizing atmosphere. The primary sintered compact is sintered at temperature higher than temperature for producing primary sintered compact in non-oxidizing atmosphere, and a porous titanium sintered compact is obtained. An INDEPENDENT CLAIM is included for production apparatus of porous titanium sintered compact.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating manufacturing method of porous titanium sintered compact. (Drawing includes non-English language text)    Slurry manufacturing step (S1)    Formation process (S2)    Foaming process (S3)    Degreasing process (S4)    Sintering process (S7)