  We incorporate clockwork mechanism into the Standard Model flavour sector and
show that the observed pattern of fermion masses and mixing can be obtained
without any unnaturally small or large parameter in the fundamental theory. By
introducing $N_f$ pairs of vectorlike fermions, as clockwork gears, for each
generation of the Standard Model fermions and setting up a characteristic
clockwork potential, it is shown that the inter-generational mass hierarchies
are determined by $N_f$. For a given type of fermions, strong or mild hierarchy
in the masses and mixing parameters can be obtained by taking the large or
small value of $N_f$. The mechanism is shown to lead to a generalized version
of the Froggatt-Nielsen mechanism as an effective description.
