Abstract: A test device having the following meritorious effects is obtained in accordance with the present invention by using at least one composition selected from the group consisting of ink compositions for detecting glucose, for detecting protein, for detecting urobilinogen, and for detecting occult blood in a body fluid, and for detecting the pH thereof:a) The test device is stable during storage in atmospheric air for a long period of time, presenting no discoloration phenomenon;b) The test device has high sensitivity coupled with excellent measurement performance;c) The regions for detecting glucose and the other body fluid ingredients and the pH can be formed directly on the surface of the test device by printing, allowing the test device to be formed by mass production and the process steps to be reduced; andd) The ink compositions for detecting glucose, etc. are stable, and can be handled easily.