The OCCULTEST OB PAPER is, an easy to use and high sensitivity and specificity kit, used for the qualitative determination of occult blood in feces. Determination of occult blood in feces is often used as a primary screening test in the diagnosis of anemia,ulcer disease, gastritis and colon cancer. Since o-tolidine and benzidine may no longer to use, to establish an ideal screening test for the determination of occult blood in feces is necessary. The OCCULTEST OB PAPER is, using pyramidon (aminopyrine), a suitable method. The method is not carcinogenic and does not require meat restriction. Theloss in the feces. The OCCULTEST OB PAPER is also specific enough not to react with substances in diet or in common medicines.