1 . . . Electromagnetic induction heating apparatus, 2 . . . Bottomed tubular container, 2a . . . Cylindrical wall section, 2b . . . Bottom wall section, 2c . . . Attachment flange, 3 . . . Base plate, 4 . . . Bolt, 5 . . . Nut; 10 . . . Tubular insulating member, 10a, 10b . . . Flange section, 10s . . . Annular stopper member, 11 . . . Cylindrical end member, 11f . . . Flange member, 12 . . . Cylindrical end member, 12f . . . Flange member, 13a, 13b . . . Packing, 14 . . . Flange member, 15 . . . Half-split annular member, 16 . . . Half-split annular member, 17a, 17b . . . Bolt, 18a, 18b . . . Nut; 20 . . . Heating magnetic body, 21 . . . Flat plate-shaped sheet member, 22 . . . Corrugated plate-shaped sheet member, 23 . . . Flow path, 25 . . . Electromagnetic induction coil; 30 . . . Inflow pipe, 31 . . . Cable passing port, 32 . . . Power cable, 35 . . . Outflow pipe, 35a . . . Large-diameter cylindrical section, 35b . . . Conical section, 35c . . . Small-diameter cylindrical section, 36 . . . Flange member, 37 . . . Bolt, 38 . . . Nut; 40 . . . Heating magnetic body, 41 . . . Pipe, 42 . . . Flow path; 50 . . . Heating magnetic body, 51 . . . Pipe, 52 . . . Flow path, 53, 54 . . . Flange member; 60 . . . Heating magnetic body, 61 . . . Flow path.