  The recent precision measurement of the $W$-boson mass reveals an exciting
hint for the new physics as of the 3-3-1 model. We indicate that the 3-3-1
model contains distinct sources by itself that may cause the $W$-mass
deviation, as measured, such as the tree-level $Z$-$Z'$ mixing, the tree-level
$W$-$Y$ and $Z$-$Z'$-$X$ mixings, as well as the non-degenerate gauge vector
$(X,Y)$ and new Higgs doublets. We point out that the gauge vector doublet
negligibly contributes to this mass shift, whereas the rest of the effects with
tree-level mixings governed by $Z$-$Z'$ and new Higgs doublets are significant.
A discussion of scalar sextet contributions is also given.
