A dielectric cytometric apparatus comprising: a flow channel (FC1, FC2; 2) having a dimension sufficiently greater than a dimension of a single cell, and including a channel member (NC; 1), said channel member (NC; 1) having a dimension of substantially the same order as the dimension of a single cell, wherein the channel member (NC; 1) is adapted to let pass through sequentially one single cell after another, and branch channels provided on the downstream side of said channel member (NC; 1) as branch channels (2a, 2b) for sorting cells included in liquid flowing through said flow channel (FC1, FC2; 2); a first electrode pair (EL1, EL2; 4a, 4b) adapted to create an alternating current electric field on said channel member, wherein a first electrode (EL1; 4a) is arranged upstream of the channel member (NC; 1) and a second electrode (EL2; 4b) is arranged downstream of the channel member (NC; 1) with respect to a flowing direction of fluid containing cells, wherein the first electrode (EL1; 4a) and the second electrode (EL2; 4b) are spatially separated from each other in said flowing direction and the channel member (NC; 1) is arranged between the first and second electrodes (EL1, EL2; 4a, 4b) of the first electrode pair; an analysis unit configured to measure a complex dielectric constant depending on said cell for each single cell flowing through said channel member (NC; 1) by creating said alternating current electric field on said channel member (NC; 1) through application of an alternating current voltage to said first electrode pair (EL1, EL2; 4a, 4b); characterized by further comprising a second electrode pair (16, 16a, 17) having a common electrode and an electrode having a plurality of electrode pointers each protruding in a direction toward the common electrode, wherein each electrode pointer and the common electrode form a respective operation-electrode pair adapted to create an electric field on a flow-channel portion (MFs) on the downstream side of said channel member (NC; 1) but on the upstream side of said branch channels (2a, 2b), wherein the operation-electrode pairs are divided into a plurality of groups (G1-G5) arranged along the fluid flow direction and adapted to be individually voltage controlled; and a cell sorting unit configured to apply a dielectrophoretic force to each single cell in order to sort said cell through use of said branch channels (2a, 2b) by individually driving said groups of operation-electrode pairs to create said electric field on the basis of said complex dielectric constant measured for that single cell by said analysis unit. a flow channel (FC1, FC2; 2) having a dimension sufficiently greater than a dimension of a single cell, and including a channel member (NC; 1), said channel member (NC; 1) having a dimension of substantially the same order as the dimension of a single cell, wherein the channel member (NC; 1) is adapted to let pass through sequentially one single cell after another, and branch channels provided on the downstream side of said channel member (NC; 1) as branch channels (2a, 2b) for sorting cells included in liquid flowing through said flow channel (FC1, FC2; 2); a first electrode pair (EL1, EL2; 4a, 4b) adapted to create an alternating current electric field on said channel member, wherein a first electrode (EL1; 4a) is arranged upstream of the channel member (NC; 1) and a second electrode (EL2; 4b) is arranged downstream of the channel member (NC; 1) with respect to a flowing direction of fluid containing cells, wherein the first electrode (EL1; 4a) and the second electrode (EL2; 4b) are spatially separated from each other in said flowing direction and the channel member (NC; 1) is arranged between the first and second electrodes (EL1, EL2; 4a, 4b) of the first electrode pair; an analysis unit configured to measure a complex dielectric constant depending on said cell for each single cell flowing through said channel member (NC; 1) by creating said alternating current electric field on said channel member (NC; 1) through application of an alternating current voltage to said first electrode pair (EL1, EL2; 4a, 4b); characterized by further comprising a second electrode pair (16, 16a, 17) having a common electrode and an electrode having a plurality of electrode pointers each protruding in a direction toward the common electrode, wherein each electrode pointer and the common electrode form a respective operation-electrode pair adapted to create an electric field on a flow-channel portion (MFs) on the downstream side of said channel member (NC; 1) but on the upstream side of said branch channels (2a, 2b), wherein the operation-electrode pairs are divided into a plurality of groups (G1-G5) arranged along the fluid flow direction and adapted to be individually voltage controlled; and a cell sorting unit configured to apply a dielectrophoretic force to each single cell in order to sort said cell through use of said branch channels (2a, 2b) by individually driving said groups of operation-electrode pairs to create said electric field on the basis of said complex dielectric constant measured for that single cell by said analysis unit.