FIELD : medicine.SUBSTANCE : invention relates to the field of medicine, namely to calcium phosphate cement for filling bone defects. Calcium phosphate cement for filling bone defects, consisting of powder containing tricalcium phosphate, hydroxyapatite and cement liquid containing magnesium phosphate, phosphoric acid, potassium carbonate and water, at a certain ratio of components.EFFECT : above composition allows to increase the porosity of calcium phosphate cement material.1 cl, 1 tbl