  We suggest that the observed properties of the charmoniumlike resonance
$X(3915)$ can possibly be explained if it is an $S-$wave molecular bound state
of $D_s \bar D_s$ meson pair with binding energy about 18\,MeV. In particular,
the decays of $X(3915)$ to pairs of non-strange $D$ mesons are suppressed and
proceed at a rate comparable to that of the decay $X(3915) \to \omega J/\psi$,
whose branching fraction can be as large as about 0.3. Other major types of
decay of $X(3915)$ with a comparable (or slightly smaller) rate are the
transition $X(3915) \to \eta \eta_c$ and the decays into light hadrons due to
the annihilation of the $c \bar c$ quark pair. The existence of a bound state
should lead to an enhancement in the spectrum of the invariant mass for the
$D_s \bar D_s$ near threshold in $B$ decays, e.g. in $B \to K D_s \bar D_s$
which enhancement can be tested experimentally.
