  We derive an observational constraint on a spherical inhomogeneity of the
void centered at our position from the angular power spectrum of the cosmic
microwave background(CMB) and local measurements of the Hubble parameter. The
late time behaviour of the void is assumed to be well described by the
so-called $\Lambda$-Lema\^itre-Tolman-Bondi~($\Lambda$LTB) solution. Then, we
restrict the models to the asymptotically homogeneous models each of which is
approximated by a flat Friedmann-Lema\^itre-Robertson-Walker model. The late
time $\Lambda$LTB models are parametrized by four parameters including the
value of the cosmological constant and the local Hubble parameter. The other
two parameters are used to parametrize the observed distance-redshift relation.
Then, the $\Lambda$LTB models are constructed so that they are compatible with
the given distance-redshift relation. Including conventional parameters for the
CMB analysis, we characterize our models by seven parameters in total. The
local Hubble measurements are reflected in the prior distribution of the local
Hubble parameter. As a result of a Markov-Chains-Monte-Carlo analysis for the
CMB temperature and polarization anisotropies, we found that the inhomogeneous
universe models with vanishing cosmological constant are ruled out as is
expected. However, a significant under-density around us is still compatible
with the angular power spectrum of CMB and the local Hubble parameter.
