A blood separation device for separating blood into a plurality of blood components (16a; 16b; 16c) under the influence of a centrifugal force (Fz) generated during a centrifugation process in a centrifuge, comprising: a first chamber for receiving a blood bag filled with the blood to be separated, which separates into the individual blood components (16a; 16b; 16c) under the influence of the centrifugal force (Fz) in such a way that each blood component (16a; 16b; 16c) is located - as seen in the direction of the centrifugal force (Fz, 'separation direction') - in a separate section of the blood bag according to its specific weight after completion of a first phase of the centrifuging process, a second chamber for receiving at least one component bag (13; 14) which is provided for filling with a respectively associated blood component (16a; 16b; 16c), wherein an inlet opening of each component bag (13; 14) is connected via a line (12a; 13a; 14a), in which a controllable valve is arranged, is connected to an outlet opening of the blood bag, a displacement body, which is arranged in the first chamber and exerts a pressing force (Fp) onto the blood bag which is directed substantially perpendicular to the direction of separation, wherein the displacement body is shaped in order to generate the pressing force (Fp) by means of the centrifugal force (Fz) and/or by means of a spring force (Ff), and a control unit, which during a second phase of the centrifuging process opens each valve until the blood component (16a; 16b; 16c) associated with this valve has passed into the associated component bag (13; 14) as a result of the pressing force (Fp) of the displacement body, wherein the displacement body has a lever arrangement which redirects part of the centrifugal force (Fz) and/or of the spring force (Ff) so that it generates the pressing force (Fp). a first chamber for receiving a blood bag filled with the blood to be separated, which separates into the individual blood components (16a; 16b; 16c) under the influence of the centrifugal force (Fz) in such a way that each blood component (16a; 16b; 16c) is located - as seen in the direction of the centrifugal force (Fz, 'separation direction') - in a separate section of the blood bag according to its specific weight after completion of a first phase of the centrifuging process, a second chamber for receiving at least one component bag (13; 14) which is provided for filling with a respectively associated blood component (16a; 16b; 16c), wherein an inlet opening of each component bag (13; 14) is connected via a line (12a; 13a; 14a), in which a controllable valve is arranged, is connected to an outlet opening of the blood bag, a displacement body, which is arranged in the first chamber and exerts a pressing force (Fp) onto the blood bag which is directed substantially perpendicular to the direction of separation, wherein the displacement body is shaped in order to generate the pressing force (Fp) by means of the centrifugal force (Fz) and/or by means of a spring force (Ff), and a control unit, which during a second phase of the centrifuging process opens each valve until the blood component (16a; 16b; 16c) associated with this valve has passed into the associated component bag (13; 14) as a result of the pressing force (Fp) of the displacement body, wherein the displacement body has a lever arrangement which redirects part of the centrifugal force (Fz) and/or of the spring force (Ff) so that it generates the pressing force (Fp).