  We show that, in frameworks of the economical 3-3-1 model, all fermions get
masses. At the tree level, one up-quark and two down-quarks are massless, but
the one-loop corrections give all quarks the consistent masses. This conclusion
is in contradiction to the previous analysis in which, the third scalar triplet
has been introduced. This result is based on the key properties of the model:
First, there are three quite different scales of vacuum expectation values:
$\om \sim {\cal O}(1) \mathrm{TeV}, v \approx 246 \mathrm{GeV}$ and $ u \sim
{\cal O}(1) \mathrm{GeV}$. Second, there exist two types of Yukawa couplings
with different strengths: the lepton-number conserving couplings $h$'s and the
lepton-number violating ones $s$'s satisfying the condition in which the second
are much smaller than the first ones: $ s \ll h$.
  With the acceptable set of parameters, numerical evaluation shows that in
this model, masses of the exotic quarks also have different scales, namely, the
$U$ exotic quark ($q_U = 2/3$) gains mass $m_U \approx 700 $ GeV, while the
$D_\al$ exotic quarks ($q_{D_\al} = -1/3$) have masses in the TeV scale:
$m_{D_\al} \in 10 \div 80$ TeV.
