On the basis of four cases with chronic glomerulonephritis in the terminal stage of renal insufficiency with uraemic pericarditis and tamponade of the pericardium, which in one patient developed before and in three patients under therapy of haemodialysis the author adopts a definite attitude to the problems of development, treatment and prognosis of uraemic pericarditis. For the treatment of the tamponade of the pericardium a suction drainage of the pericardium is recommended. Apart from this a particularly intensive haemodialytic treatment is necessary. After overcome uraemic pericarditis must be reckoned with a constriction of the pericardium as late complication which should early be treated operatively.