A faecal impaction is a condition that is well known as a complication of long-term neuroleptic treatment. Rarely can provide life-threatening complications such as gastrointestinal obstruction. Long-term consolidation of faecal masses can lead to create a well-formed, hard intraluminal conglomerate (faecaloma). Fecaloma can be successfully conservatively treated. In some cases endoscopic methods may be effective. Rarely surgical treatment is required. Prophylaxis of faecal impaction is important to patients undergoing neuroleptic therapy. Indispensable is to monitor the patient's condition for constipation and obstruction of the gastrointestinal tract. In this case study, we want to present a case of a giant faecaloma, which appeared as a complication of neuroleptic treatment.