Postoperative intraperitoneal adhesions are known to occur after conventional surgery. The prospective study that we have performed in 1992 shows that the frequency of postoperative intraperitoneal adhesions is very high (93% of patients). It is higher than was stated 20 years ago, while so-called "spontaneous" adhesions seem to be decreasing. The histological study of postoperative intraperitoneal adhesions shows a specific evolution in time and a very high frequency of foreign bodies (starch, variably decayed textile fibers) (92%). The very great frequency of such foreign bodies in postoperative intraperitoneal adhesions, logically involving them in the genesis of this condition, may be an argument in favor of the new surgical techniques, especially of celioscopy.