Green stool is the acquisition of various greenish hues by stools. The symptom is often accompanied by diarrhea, flatulence, and abdominal pain. The appearance of a green color of feces is observed with the use of certain foods and drugs, dysbacteriosis, intestinal infections, and chronic pathology of the gastrointestinal tract. Examination of the patient involves a coprogram, ultrasound examination of the abdominal organs, radiography and endoscopy. To normalize the color of feces, a diet, sorbents, probiotics, and enzyme preparations are prescribed.