Foreign bodies in the common duct are such rare surgical entities that a recent case observed at the Boston City Hospital is presented. REPORT OF A CASE M. R., (B. C. H. No. 1502986) a 67-year-old white man admitted to the hospital because of jaundice. This patient, troubled with indigestion for six months, noted a dull persistent epigastric pain approximately five days before entry which radiated to the left lower quadrant and was associated with nausea and scleral jaundice. Three days before entry dark-colored urine was noted, but no color changes were observed in the stools. Physical examination was essentially negative except for slight tenderness in the right upper quadrant of the abdomen associated with jaundice. Laboratory findings revealed bile in the urine, gray stools, icteric index 48, urine urobilinogen 0, prothrombin time normal, cephalin-flocculation 3-f-, formol-gel negative. A duodenal aspiration revealed an absence of carcinoma cells. A flat plate