  We demonstrate that quantum error correction is realized by the
renormalization group in scalar field theories. We construct $q$-level states
by using coherent states in the IR region. By acting on them the inverse of the
unitary operator $U$ that describes the renormalization group flow of the
ground state, we encode them into states in the UV region. We find that the
Knill-Laflamme condition is satisfied for operators that create coherent
states. We verify this to the first order in the perturbation theory. This
result suggests a general relationship between the renormalization group and
quantum error correction and should give insights into understanding a role
played by them in the gauge/gravity correspondence.
