  We analyze the unparticle effects on the lepton flavor universality violating
ratios in $b\to s$ transition, $R(K^{(*)})$. We concentrate on the vector
unparticles which contribute to the relevant Wilson coefficients $C_{9,10}$.
New effects appear in the form of some powers of the momentum transfer squared,
which is a different feature from other new physics models like leptoquarks or
$Z'$. Constraints from $B_s$-${\bar B}_s$ mixing, $B_s\to\mu^+\mu^-$, and the
electron/muon anomalous magnetic moments are considered. It is found that the
vector unparticles successfully explain $R(K^{(*)})$ with moderate values of
model parameters.
