  The Hubble constant problem is the discrepancy between different measurements
of the Hubble constant in different scales. We show that this problem can be
resolved within the general relativistic framework of the perturbation theory
in the inhomogeneous universe, with the help of spatial averaging procedure
over a finite local domain in the $t=\mbox{const.}$ hypersurface. The idea
presented in this paper is unique in the sense that it has all of the following
properties. a) It is based on the general relativistic perturbation theory,
with ordinary dust matter only. No strange matter nor energy components are
required. b) The employment of the spatially invariant averaging procedure on
the finite domain is essential. c) The key is the first-order effect of the
inhomogeneities in the linear perturbation theory. No non-linear effects are
required.
