Abstarct: The spin transport has been studied in a domain wall (DW) between two oppositely directed ferromagnetic domains. Using the kinetic equations in Wigner space, diffusion equations for the transverse spin accumulation and then extra voltage drop and resistance due to the spin accumulation in DW were calculated. This result indicated the transverse spin accumulation decomposed into spatially independent and dependent parts. The spin accumulation in a thick domain wall is nearly spatially independent and for a thin domain wall, it dependes all position into wall (except at the boundaries of the domain wall). The result showed the voltage drop and resistance due to spin accumulation decrease exponentially as a function of the wall thickness. Then, the effect of the spin orbit (Rashba) coupling investigated on the spin accumulation and subsequantly on the resistanc. The result demonstrated increase in spin accumulation and resistance in presence of the Rashba coupling.