  We provide a detailed quantitative analysis of transport properties in the
p-wave superconducting state of Sr2RuO4. Specifically, we calculate ultrasound
attenuation rate and electronic thermal conductivity within the mean field
approximation. The impurity scattering of the quasi-particles are treated
within the self-consistent T-matrix approximation, and assumed to be in the
unitarity limit. The momentum dependence of the gap function is determined by
solving the Eliashberg equation for a three-band Hubbard model with the
realistic electronic structure of Sr2RuO4. On the basis of the microscopic
theory, we can naturally expect nodal structures along the c-axis on the
cylindrical Fermi surfaces, even if we assume the chiral pairing state (i.e.,
\Delta(k) \sim k_x \pm {\rm i} k_y). Consequently, we obtain the temperature
dependence of the transport coefficients in agreement with the experimental
results. We can clarify that actually the thermal excitations on the passively
superconducting bands contribute significantly to the thermal conductivity in a
wide temperature range, in contrast to the case of other physical quantities.
