A stacked card connector (100) includes a first electrical card connector (1), a second electrical card connector (2) under the first electrical card connector. The first card connector comprises a first insulating housing (12) received a plurality of first terminals (13), and the first terminals comprises a vertical portion (132). The second card connector (2) includes a second insulating housing (22) received a plurality of second terminals (24), the second terminals comprises a tail portion (242). And the tail portion of the second terminals defines at least one cutout (2420) among the tail portion (242), the distance between two adjacent vertical portions (132) being equal with the distance between two adjacent tail portions (242).