A microdevice for fusing cells including: a membrane with a plurality of pores having a diameter smaller than the smallest diameter among the first kind of cells and second kind of cells; a first chamber where the first cell is located and a second chamber where the second cell is located, wherein the membrane is disposed therebetween; a first electrode combined to the first chamber; a second electrode combined to the second chamber; and a power generator applying a voltage to the first and second electrodes. Accordingly, the first and second cells across the membrane may be arranged in a one-to-one manner between the first and second electrodes, and thus the first and second cells having different traits may be smoothly fused in a one-to-one manner when electric signals are sequentially applied thereto.