A method for detecting sickle-cell disease in an individual. A blood sample from an individual is brought into contact with an agent for inducing the sickling of red blood cells suitable for placing the red blood cells in a hypoxic condition. The blood sample is filtered through a porous membrane of which the pore size is determined to retain the sickled red blood cells, and allow the non-sickled red blood cells to pass through. The possible presence of a residue on the membrane is detected, during and/or after the filtering step. The presence indicating that the individual is suffering from sickle-cell disease.