A flexible printed circuit board (FPCB) is disclosed. The FPCB can be employed to connect an interface card having connectors with a two-stage configuration to a connection destination of a portable information equipment. The FPCB includes a bend line located between an upper-stage terminal group and a lower-stage terminal group. The FPCB can be bent along the bend line to allow the upper-stage terminal group and the lower-stage terminal group to be mutually superimposed over each other. In addition, the upper-stage terminal group of the FPCB is connected to the upper-stage-side connector terminal group of the interface card, and the lower-stage terminal group of the FPCB is connected to the lower-stage-side connector terminal group of the interface card.