In this paper, a novel power divider integrated with substrate integrated waveguide (SIW) and defected ground structures (DGS) techniques is proposed to provide both power dividing and flltering functions. The SIW technique holds advantages of low proflle, low-lost, mass-production, easy fabrication and fully integration with planar circuits. By integrating with defected ground structures (DGS) technique, the size and cost of system can be efiectively reduced as the proposed power divider has a function of flltering which leads to reduction of one fllter. In order to verify the design approach, the proposed power divider with equal power divisions at the center frequency of 8.625GHz is fabricated and measured. The measured results demonstrate that the insertion loss is less than 1.2dB and the input return loss less than 16dB across the bandwidth of 1.4GHz (FBW is 16%). Moreover, the imbalances of the amplitude and phase are less than 0.3dB and 0.5 degree, respectively.