PURPOSE:To prevent the clogging of a sewage treating tube of a stool, by forming a part or the whole of a sheet of test paper piece from a water-soluble material. CONSTITUTION:A test piece 1 is made up of a plurality of test papers 12 impregnated with a reagent for sugar, occult blood and urobilin stuck on the surface of a rectangular flat sheet 11 in a series at a fixed interval. The sheet 11 is made of a water-soluble material. The sheet 11 uses, for example, material pulp or cotton fiber as pulp material while employing a machine-made Japanese paper which is beaten being isolated so as to be made water-soluble by the nature of the pulp material. This allows the test paper to be dissolved by a flushing water of a stool thereby eliminating the fear of clogging a sewage treating tube of the stool.
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