Volume multiple-scattering media induce large intensity fluctuations of 'the light which are similar to the "speckle patterns" due to single scattering from rough surfaces. These fluctuations are explained as a result of the in- terference between optical waves with random phase differences, and they usually obey the Rayleigh statistics. In case of the multiply- scattered light, however, the optical waves propagating through the same paths exist in a medium, and their interference effects mod- ify the properties of intensity fluctuations. Re- cently discovered phenomena, such as "en- hanced backscattering", "optical memory ef- fect" and "long-range intensity correlation" [1- 3], are caused by these interference effects. In a strong scattering regime, interference effects influence strongly the properties of the scat- tered intensity. In this paper, we present a numerical sim- ulation that takes account of interference ef- fects in multiple-scattering media, and evaluate the statistical properties of the scattered light across the output field(sample surface) and in the far-field.